Triangle Practice

Front

What is a Right Isosceles Triangle?

Back

A triangle with two equal sides and one right angle (90°).

Front

What is the Triangle Sum Theorem?

Back

The sum of the interior angles of a triangle is always 180°.

Front

If one angle of a triangle measures 90° and another measures 45°, what is the measure of the third angle?

Back

45°.

Front

What is the measure of the vertex angle in an isosceles triangle with base angles of 40°?

Back

100°.

Front

Define an Equilateral Triangle.

Back

A triangle with all three sides equal and all three angles measuring 60°.

Front

What is an Obtuse Triangle?

Back

A triangle that has one angle measuring more than 90°.

Front

How do you find the missing angle in a triangle?

Back

Subtract the sum of the known angles from 180°.

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

If two angles of a triangle are 70° and 50°, what is the third angle?

Back

60°.

Front

What is the relationship between the angles in an Isosceles Triangle?

Back

The angles opposite the equal sides are equal.