Angles and Triangles

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.

Front

If one angle of a triangle measures 60 degrees and another measures 80 degrees, what is the measure of the third angle?

Back

40 degrees.

Front

What type of triangle has at least two equal sides?

Back

Isosceles triangle.

Front

What type of angle measures exactly 90 degrees?

Back

Right angle.

Front

What is a right triangle?

Back

A triangle that has one angle measuring 90 degrees.

Front

If one angle of a triangle measures 75 degrees and another measures 45 degrees, what is the measure of the third angle?

Back

30 degrees.

Front

What is an acute angle?

Back

An angle that measures less than 90 degrees.

Front

What is an obtuse angle?

Back

An angle that measures more than 90 degrees but less than 180 degrees.

Front

What is a scalene triangle?

Back

A triangle with all sides of different lengths.

Front

What is an equilateral triangle?

Back

A triangle with all three sides of equal length.