Finding the missing angle of a Triangle (Beg.)

Front

What is a triangle?

Back

A triangle is a three-sided polygon.

Front

What are the three angles in a triangle called?

Back

The three angles in a triangle are called interior angles.

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 in a triangle is 90 degrees, what type of triangle is it?

Back

It is a right triangle.

Front

What do we call a triangle with all sides of different lengths?

Back

It is called a scalene triangle.

Front

What do we call a triangle with at least two equal sides?

Back

It is called an isosceles triangle.

Front

What do we call a triangle with all sides equal?

Back

It is called an equilateral triangle.

Front

How do you find a missing 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 60 degrees, what is the missing angle?

Back

The missing angle is 70 degrees.

Front

What is an acute angle?

Back

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