Missing Angle in a Triangle

Front

What is the sum of the angles in a triangle?

Back

180 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 right angle?

Back

An angle that measures exactly 90 degrees.

Front

What is an equilateral triangle?

Back

A triangle with all three sides of equal length and all angles measuring 60 degrees.

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

What is a scalene triangle?

Back

A triangle with all sides of different lengths.

Front

How do you find the missing angle in a triangle?

Back

Subtract the sum of the known angles from 180 degrees.

Front

If one angle in a triangle is 90 degrees and another is 40 degrees, what is the measure of the third angle?

Back

50 degrees.

Front

What type of triangle has one angle greater than 90 degrees?

Back

An obtuse triangle.