Classifying Triangles

Front

What is a triangle?

Back

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

Front

What are the types of triangles based on angles?

Back

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

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: No sides are equal.

Front

What is an Acute Isosceles Triangle?

Back

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

Front

What is a Right Triangle?

Back

A Right Triangle has one angle that is exactly 90°.

Front

What is a Scalene Triangle?

Back

A Scalene Triangle has no equal sides.

Front

What is an Equilateral Triangle?

Back

An Equilateral Triangle has all three sides equal and all angles equal to 60°.

Front

How can you identify an Isosceles Triangle?

Back

An Isosceles Triangle can be identified by having at least two equal sides.

Front

What is the sum of angles in any triangle?

Back

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

Front

What is an Obtuse Triangle?

Back

An Obtuse Triangle has one angle that is greater than 90°.