Isosceles & Equilateral Triangles Practice

Front

What is an isosceles triangle?

Back

A triangle with at least two sides that are equal in length.

Front

What is an equilateral triangle?

Back

A triangle where all three sides are equal in length.

Front

If two sides of a triangle are congruent, then the angles opposite those sides are __________.

Back

congruent.

Front

What is the perimeter of an equilateral triangle with each side measuring 4?

Back

12 (4 + 4 + 4).

Front

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

Back

Each angle measures 60 degrees.

Front

In an isosceles triangle, if one angle 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 sum of the angles in any triangle?

Back

180 degrees.

Front

If one angle of a triangle measures 90 degrees, what type of triangle is it?

Back

It is a right triangle.

Front

What do we call the longest side of a right triangle?

Back

The hypotenuse.

Front

If a triangle has sides measuring 5, 5, and 8, what type of triangle is it?

Back

It is an isosceles triangle.