Sum of Angles in Triangles (180 degrees)

Front

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

Back

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

Front

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

Back

It is a right triangle.

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is an obtuse angle?

Back

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

Front

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

Back

Subtract the sum of the known angles from 180 degrees.

Front

If two angles in a triangle are 50 degrees and 35 degrees, what is the measure of the third angle?

Back

The third angle measures 95 degrees (180 - (50 + 35)).

Front

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

Back

In an isosceles triangle, the two angles opposite the equal sides are equal.

Front

What is the formula to calculate the sum of angles in any polygon?

Back

The sum of the interior angles of a polygon with n sides is (n-2) * 180 degrees.

Front

If a triangle has angles measuring 40 degrees and 30 degrees, what is the measure of the third angle?

Back

The third angle measures 110 degrees (180 - (40 + 30)).

Front

What is a scalene triangle?

Back

A scalene triangle is a triangle with all sides and angles of different measures.