Triangle Review

Front

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

Back

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

Front

Define an isosceles triangle.

Back

An isosceles triangle is a triangle that has at least two sides of equal length.

Front

What is a right triangle?

Back

A right triangle is a triangle that has one angle measuring 90°.

Front

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

Back

To find the measure of a missing angle, subtract the sum of the known angles from 180°.

Front

What is the formula to find the third angle in a triangle if two angles are known?

Back

Front

What is a scalene triangle?

Back

A scalene triangle is a triangle in which all three sides are of different lengths.

Front

What is an equilateral triangle?

Back

An equilateral triangle is a triangle where all three sides are of equal length and all angles are 60°.

Front

If one angle of a triangle is 65° and another is 50°, what is the measure of the third angle?

Back

The third angle is 65° (180° - (65° + 50°)).

Front

What is the relationship between the angles in a right triangle?

Back

In a right triangle, the sum of the two non-right angles is always 90°.

Front

Back