Classify triangles

Front

What are the three types of triangles based on side lengths?

Back

Equilateral, Isosceles, Scalene.

Front

What is an equilateral triangle?

Back

A triangle with all three sides of equal length.

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

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

Back

180 degrees.

Front

What is a right triangle?

Back

A triangle that has one angle measuring 90 degrees.

Front

What is an acute triangle?

Back

A triangle where all angles are less than 90 degrees.

Front

What is an obtuse triangle?

Back

A triangle that has one angle measuring more than 90 degrees.

Front

What is the triangle inequality theorem?

Back

The sum of the lengths of any two sides of a triangle must be greater than the length of the third side.

Front

If two angles of a triangle are 50 degrees and 60 degrees, what is the measure of the third angle?

Back

70 degrees.