Classifying Triangles

Front

What is an acute angle?

Back

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

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 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

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Front

What defines an equilateral triangle?

Back

An equilateral triangle is a triangle with all three sides of equal length.

Front

What defines an isosceles triangle?

Back

An isosceles triangle is a triangle with at least two sides of equal length.

Front

What defines a scalene triangle?

Back

A scalene triangle is a triangle with all sides of different lengths.

Front

How can you identify an isosceles triangle?

Back

An isosceles triangle can be identified by having two equal sides and two equal angles.

Front

What is the sum of the angles in any triangle?

Back

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

Front

What is the relationship between the sides and angles in a triangle?

Back

In a triangle, the larger the angle, the longer the opposite side.