Isosceles and Equilateral Triangles Practice

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°.

Front

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

Back

180°.

Front

What is an acute triangle?

Back

A triangle where all three angles are less than 90°.

Front

What is a scalene triangle?

Back

A triangle with all sides of different lengths.

Front

What is an obtuse triangle?

Back

A triangle with one angle greater than 90°.

Front

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

Back

The angles opposite the equal sides are equal.

Front

How do you determine if a set of angles can form a triangle?

Back

The sum of the angles must equal 180°.

Front

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

Back

Each angle measures 60°.

Front

If two angles of a triangle are 35° and 95°, what is the measure of the third angle?

Back

The third angle measures 50°.