# What defines an isosceles triangle?

## What defines an isosceles triangle?

Definition of isosceles triangle

mathematics. : a triangle in which two sides have the same length.

## What is the answer to isosceles triangle?

An isosceles triangle has one vertex angle and two congruent base angles.

## Do isosceles triangles have equal angles?

An isosceles triangle therefore has both two equal sides and two equal angles. The name derives from the Greek iso (same) and skelos (leg). A triangle with all sides equal is called an equilateral triangle, and a triangle with no sides equal is called a scalene triangle.

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## What do you call a triangle with 3 equal sides?

Equilateral. An equilateral triangle has three equal sides and angles. It will always have angles of 60° in each corner.

## Which two angles are equal in an isosceles triangle?

Properties of Isosceles Triangle

Two equal sides and two equal angles. The two equal sides of an isosceles triangle are called the legs and the angle between them is called the vertex angle or apex angle. The side opposite the vertex angle is called the base and base angles are equal.

## How many sides does an isosceles triangle?

In geometry, triangle is a three-sided polygon that is classified into three categories based on its sides, such as: Scalene triangle (All three sides are unequal) Isosceles triangle (Only two sides are equal) Equilateral triangle (All three sides are equal)

## How do you find the sides of an isosceles triangle?

To find the unknown leg length with a given base length and altitude, use the following formula: sqrt(A^2 – (B / 2)^2), where A is the altitude and B is the length of the base. For example, given an isosceles triangle with base length 6 and altitude 7, the leg lengths are: sqrt(7^2 + (6 / 2)^2) = sqrt(58) = 7.6.

## Which two sides of isosceles are equal?

In an isosceles triangle that has exactly two equal sides, the equal sides are called legs and the third side is called the base. The angle included by the legs is called the vertex angle and the angles that have the base as one of their sides are called the base angles.

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## What are the two features of an isosceles triangle?

An Isosceles Triangle has the following properties: Two sides are congruent to each other. The third side of an isosceles triangle which is unequal to the other two sides is called the base of the isosceles triangle. The two angles opposite to the equal sides are congruent to each other.

## What are the 3 main types of triangles?

According to internal angles, there are three types of triangles i.e., acute, right, and obtuse-angled triangle. According to the length of sides, triangles can be classified into 3 categories i.e., Scalene, Isosceles, and 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 do you call a triangle with no?

A triangle with no equal sides is called a scalene triangle. A triangle with a right angle is called a right triangle. A triangle with three equal sides is called an equilateral triangle.

## How do you find the area of a isosceles triangle?

For an isosceles triangle, the area can be easily calculated if the height (i.e. the altitude) and the base are known. Multiplying the height with the base and dividing it by 2, results in the area of the isosceles triangle.

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