Classify Triangles by Sides and Angles

Front

What is an Isosceles Triangle?

Back

A triangle with at least two sides that are equal in length.

Front

What is an Equilateral Triangle?

Back

A triangle where all three sides are equal in length.

Front

What is a Scalene Triangle?

Back

A triangle with all sides of different lengths.

Front

What is an Acute Triangle?

Back

A triangle where all three angles are less than 90 degrees.

Front

What is a Right Triangle?

Back

A triangle that has one angle equal to 90 degrees.

Front

What is an Obtuse Triangle?

Back

A triangle that has one angle greater than 90 degrees.

Front

True or False: An obtuse triangle has 1 obtuse angle.

Back

True

Front

What do the lines (sticks) on a triangle mean?

Back

The lines (sticks) show sides that are equal.

Front

How many sides does a triangle have?

Back

A triangle has three sides.

Front

What is the sum of the angles in a triangle?

Back

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