Classifying Triangles by Sides and Angles

Front

What is a triangle?

Back

A triangle is a polygon with three edges and three vertices.

Front

What are the three types of triangles based on sides?

Back

Equilateral, Isosceles, and 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 are the three types of triangles based on angles?

Back

Acute, Right, and Obtuse.

Front

What is an acute triangle?

Back

A triangle with all three angles less than 90 degrees.

Front

What is a right triangle?

Back

A triangle with one angle equal to 90 degrees.

Front

What is an obtuse triangle?

Back

A triangle with one angle greater than 90 degrees.

Front

True or False: A right triangle has two right angles.

Back

False.