Triangles
- Equilateral
- Isosceles. Isosceles triangles have 2 equal sides and 2 equal angles.
- Right-angled
- Scalene. Scalene triangles have no equal sides and no equal angles. Test your maths and times table skills! ...
- Acute-angled.
- Obtuse-angled.
- Right-angled.
What are the names of different triangles?
What are the different types of triangle?
- Equilateral. An equilateral triangle has three equal sides and angles. ...
- Isosceles. An isosceles triangle can be drawn in many different ways. ...
- Right-angled triangle. A right-angled triangle has one 90° angle. ...
- Scalene. A scalene triangle has three different angles and none of its sides are equal in length.
- Obtuse. ...
What are the types of triangles and their definitions?
Types of Triangles with Respect to Sides
- Equilateral Triangle. This type of triangle consists of three equal sides and equal angles. ...
- Isosceles triangle. The triangle with only two equal sides is known as the isosceles triangle. Not only two equal sides, but the isosceles triangle also consists of two equal angles.
- Scalene Triangle. The triangle with no equal sides is the scalene triangle. ...
What are the three types of triangles?
Triangles are grouped into three kinds based on the measure of their angles:
- Acute triangle
- Obtuse triangle
- Right triangle
What is the sum of the angles of a triangle?
Interior angles have the following properties:
- The sum of interior angles is 180 degrees (Triangle Angle Sum Theorem).
- All interior angles of a triangle are more than 0° but less than 180°.
- The bisectors of all three interior angles intersect inside a triangle at a point called the in-center, which is the center of the in-circle of the triangle.
What are the 4 angle names for a triangle?
Types of Triangles Based on Angles Acute-angled. Obtuse-angled. Right-angled.
What are the 4 parts of a triangle?
Below are the parts of a triangle;Base: The base is the horizontal side of the triangle.Base Angles: The two angles at the end of each base are called base angles.Vertical Angle: This is the third angle which is opposite to the base.Vertex: This is the point at which the vertical angle is formed.More items...
Does a triangle have 4 angles?
It is the simplest shape within a classification of shapes called polygons. All triangles have three sides and three angles, but they come in many different shapes and sizes. Within the group of all triangles, the characteristics of a triangle's sides and angles are used to classify it even further.
What are the 3 main types of triangles?
According to the length of sides, triangles can be classified into 3 categories i.e., Scalene, Isosceles, and Equilateral triangle.
How many angles are there in a triangle?
three anglesThe sum of the three angles of any triangle is equal to 180 degrees.
What are elements of a triangle?
A triangle is a simple closed curve or polygon which is created by three line-segments. In geometry, any three points, specifically non-collinear, form a unique triangle and separately, a unique plane (known as two-dimensional Euclidean space). The basic elements of the triangle are sides, angles, and vertices.
Are there 4 sides to a triangle?
The triangle has three (3) sides. The triangle is a polygon that contains three sides and three inner angles and three vertices.
How many types of angles are there?
In geometry, there are various types of angles, based on measurement. The names of basic angles are Acute angle, Obtuse angle, Right angle, Straight angle, reflex angle and full rotation.
How do you name a triangle?
A triangle that has three acute angels is called an acute triangle. A triangle that has one right angle is called a right triangle. A triangle that has one obtuse angle is called an obtuse triangle. When a triangle has three congruent sides, we call the triangle an equilateral triangle.
What are the 7 types of triangles?
To learn about and construct the seven types of triangles that exist in the world: equilateral, right isosceles, obtuse isosceles, acute isosceles, right scalene, obtuse scalene, and acute scalene.
What are the 12 types of triangles?
Terms in this set (6)Scalene Triangle. A triangle that has no congruent sides.Acute Triangle. A triangle that has all three angles with measures of less than 90 degrees.Obtuse Triangle. A triangle that has one angle with a measure of greater than 90 degrees.Isosceles Triangle. ... Equilateral Triangle. ... Right Triangle.
What are the 6 types of triangles?
The six types of triangles are: isosceles, equilateral, scalene, obtuse, acute, and right.
What are the 4 secondary parts of a triangle?
Terms in this set (8)Median. a segment whose endpoints are a vertex of the triangle and the midpoint of the opposite side.Angle bisector. ... Altitude. ... Perpendicular Bisector. ... Incenter. ... Centroid. ... Orthocenter. ... Circumcenter.
Can triangles have 4 sides?
(i) In a right-angled triangle which is not isosceles, the three sides and the second tangent to the incircle from the circumcentre all satisfy the conditions a), b), and c), so that such a triangle also has a fourth side.
What are the 6 parts of a triangle?
Parts of a TriangleAdjacent. The two sides of a triangle which form a particular vertex are referred to as adjacent to that angle. ... Opposite. ... Base. ... Apex. ... Height. ... Isosceles Triangle. ... Equilateral Triangle. ... Scalene Triangle.More items...•
What is a shape with 4 right angles?
What is a rectangle? A rectangle is a quadrilateral with 4 right angles. A shape with four sides of equal length. The shape has two sets of parallel sides and has four right angles.
What are the other two angles called?
The other two angles are called base angles (Figure 1 ). Figure 1 Parts of an isosceles triangle. In a right triangle, the side opposite the right angle is called the hypotenuse, and the other two sides are called legs (Figure 2 ). Figure 2 Parts of a right triangle.
What are the legs of an isosceles triangle?
Legs, base, vertex angle, and base angles. In an isosceles triangle, the two equal sides are called legs, and the third side is called the base . The angle formed by the two equal sides is called the vertex angle. The other two angles are called base angles (Figure 1 ).
What are the different types of triangles?
Types of Triangles. Equilateral Triangles . The Equilateral Triangles have the following properties (in addition to the properties above for all triangles): Three straight sides of equal length. Three angles, all equal to 60°. Three lines of symmetry.
How many angles does an obtuse triangle have?
Obtuse triangles have one obtuse angle (angle which is greater than 90°). It is possible to have a obtuse isosceles triangle – a triangle with an obtuse angle and two equal sides.
What is an acute isosceles triangle?
Acute triangles. Acute triangles have all acute angles (angles less than 90°). It is possible to have an acute triangle which is also an isosceles triangle – these are called acute isosceles triangles.
How many sides does a right triangle have?
The Right Triangles (right-angled triangles) have one right angle (equal to 90°).It is possible to have a right isosceles triangle – a triangle with a right angle and two equal sides.
What are the properties of equilateral triangles?
The Equilateral Triangles have the following properties (in addition to the properties above for all triangles): 1 Three straight sides of equal length 2 Three angles, all equal to 60° 3 Three lines of symmetry
What is the difference between a triangle and an isosceles triangle?
If all the 3 sides of a triangle are equal then it is an equilateral triangle. If 2 sides of a triangle are equal, it is an isosceles triangle.
What is the angle of a right triangle?
Right triangle: A right triangle has a 90 degrees angle.The following is a right triangle.
What is the name of the triangle with two equal sides?
If a triangle has only acute angles and two equal sides, we can call that triangle acute isosceles triangle. If a triangle has two equal sides and one obtuse angle, we can call that triangle obtuse isosceles triangle.
How to make a obtuse isosceles triangle?
Click on the obtuse isosceles triangle. Click on the obtuse scalene triangle. Match the following items: Fill in the blank fields below. Drag the words and drop them to the appropriate places. Drag the words and drop them to the appropriate places. Fill in the blank fields below. Click on the right isosceles triangle.
What is a scalene triangle?
A triangle classified by its sides only can either be scalene, isosceles, or equilateral. Scalene triangle: A scalene triangle is a triangle that has no equal sides. The following is a scalene triangle. Isosceles triangle: An isosceles triangle is a triangle that has two equal sides. The following is an isosceles triangle.
What is an equilateral triangle?
Equilateral triangle: An equilateral triangle is a triangle that has three equal sides. The following is an equilateral triangle.
Can a triangle be obtuse and equilateral?
No it is not possible. A triangle cannot be obtuse and equilateral at the same time. An equilateral triangle cannot have an obtuse angle because all 3 angles in an equilateral triangle measure 60 degrees.
Can you name a triangle with angles and sides?
We can also name triangles using angles and sides at the same time.
What is a triangle in which one of the measures of the angles is 90 degrees?
A triangle in which one of the measures of the angles is 90 degrees is called a right-angled triangle or right triangle.
What is a right triangle with two different values called?
There are a few special right triangles namely the isosceles right triangles and the scalene right triangles. The triangle having both the other two angles equal is referred to as an isosceles right triangle, and the triangle with the other two angles having different values is called a scalene right triangle.
What is a Right Triangle?
The definition for a right triangle states that if one of the angles of a triangle is a right angle - 90º, the triangle is called a right-angled triangle or simply, a right triangle. In the given image, triangle ABC is a right triangle, where we have the base, the altitude, and the hypotenuse. Here AB is the base, AC is the altitude, and BC is the hypotenuse. The hypotenuse is the important side of a right triangle which is the largest side and is opposite to the right angle within the triangle.
What is the ratio of a scalene triangle to its shortest side?
There is also a special case of a scalene triangle 30º-60º-90º which is also a right triangle where the ratio of the triangle's longest side to its shortest side is 2:1. The side opposite to the 30º angle is the shortest side.
What is the largest side of a right triangle?
The side opposite to the right angle is the largest side and is referred to as the hypotenuse. Further, based on the other angle values, the right triangles are classified as an isosceles right triangle and a scalene right triangle.
What is the side of a right triangle called?
The side BC opposite to the right angle is called the hypotenuse and it is the longest side of the right triangle. Some of the examples of right triangles in our daily life are the triangular slice of bread, a square piece of paper folder across the diagonal, or the 30-60-90 triangular scale in a geometry box.
What is a 90 degree angle called?
A 90-degree angle is called a right angle , and hence the triangle with a right angle is called a right triangle. In this triangle, the relationship between the various sides can be easily understood with the help of the Pythagoras rule.
