What is Isosceles Triangle?
A triangle with two sides of equal length is an isosceles triangle. The two equal sides of an isosceles triangle are known as ‘legs’ whereas the third or unequal side is known as the ‘base’.
Angles opposite to equal sides in an isosceles triangle are always of equal measure. In the given isosceles triangle, if AB = AC then ∠B = ∠C
Here are a few examples of the isosceles triangle:
Real life examples
Many things in the world have the shape of an isosceles triangle. Some popular examples of an isosceles triangle in real life are a slice of pizza, a pair of earrings.
Nonexamples
General properties
The equal sides of an isosceles triangle are known as the ‘legs.’
The third and unequal side of an isosceles triangle is known as the ‘base.’
The angle made by the two equal sides of an isosceles triangle is known as the ‘vertex angle.’
The angles that involve the base of an isosceles triangle are known as the ‘base angles.’
The angles situated opposite to the equal sides of an isosceles triangle are always equal.
All the three angles situated within the isosceles triangle are acute, which signifies that the angles are less than 90°.
The sum of three angles of an isosceles triangle is always 180°, which means we can find out the third angle of a triangle if the two angles of an isosceles triangle are known.
Fun Facts
