Isosceles and Equilateral Triangles

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

What is an equilateral triangle?

Back

A triangle with all three sides of equal length and all angles measuring 60 degrees.

Front

What is the sum of the interior angles of a triangle?

Back

180 degrees.

Front

If two angles of a triangle are equal, what type of triangle is it?

Back

It is an isosceles triangle.

Front

What is an equiangular triangle?

Back

A triangle where all angles are equal.

Front

How do you find the measure of the third angle in a triangle?

Back

Subtract the sum of the two known angles from 180 degrees.

Front

What is the relationship between the angles in an equilateral triangle?

Back

All angles are equal and each measures 60 degrees.

Front

If one angle of an isosceles triangle measures 40 degrees, what are the measures of the other two angles?

Back

Each of the other two angles measures 70 degrees.

Front

What is the definition of a scalene triangle?

Back

A triangle with all sides of different lengths and all angles of different measures.

Front

What is the measure of each angle in an equiangular triangle?

Back

Each angle measures 60 degrees.