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 where all three sides are of equal length and all angles measure 60 degrees.

Front

What does 'acute' mean in relation to triangles?

Back

A triangle with all angles measuring less than 90 degrees.

Front

What does 'obtuse' mean in relation to triangles?

Back

A triangle with one angle measuring more than 90 degrees.

Front

What is the sum of the angles in any triangle?

Back

180 degrees.

Front

How do you classify a triangle with one angle measuring 90 degrees?

Back

It is classified as a right triangle.

Front

What are the angles in an equilateral triangle?

Back

Each angle measures 60 degrees.

Front

What is the relationship between the sides and angles in an isosceles triangle?

Back

The angles opposite the equal sides are also equal.

Front

If two angles of a triangle are known, how can you find the third angle?

Back

Subtract the sum of the known angles from 180 degrees.

Front

What is an equiangular triangle?

Back

A triangle where all angles are equal, which is also an equilateral triangle.