Classifying Triangles by Angles and Sides

Front

What is a triangle?

Back

A triangle is a three-sided polygon.

Front

What are the types of triangles based on angles?

Back

1. Acute Triangle: All angles are less than 90 degrees. 2. Right Triangle: One angle is exactly 90 degrees. 3. Obtuse Triangle: One angle is greater than 90 degrees.

Front

What are the types of triangles based on sides?

Back

1. Equilateral Triangle: All sides are equal. 2. Isosceles Triangle: Two sides are equal. 3. Scalene Triangle: All sides are different.

Front

What is an Acute Isosceles Triangle?

Back

An Acute Isosceles Triangle has two equal sides and all angles are less than 90 degrees.

Front

What is a Right Isosceles Triangle?

Back

A Right Isosceles Triangle has two equal sides and one angle that is exactly 90 degrees.

Front

What is an Obtuse Isosceles Triangle?

Back

An Obtuse Isosceles Triangle has two equal sides and one angle that is greater than 90 degrees.

Front

What is an Obtuse Scalene Triangle?

Back

An Obtuse Scalene Triangle has all sides different and one angle that is greater than 90 degrees.

Front

What is a Right Scalene Triangle?

Back

A Right Scalene Triangle has all sides different and one angle that is exactly 90 degrees.

Front

How do you classify a triangle with one angle greater than 90 degrees?

Back

It is classified as an Obtuse Triangle.

Front

How do you classify a triangle with all sides equal?

Back

It is classified as an Equilateral Triangle.