Classifying Triangles

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°. 2. Right Triangle: One angle is exactly 90°. 3. Obtuse Triangle: One angle is greater than 90°.

Front

What is an acute triangle?

Back

An acute triangle is a triangle where all three angles are less than 90°.

Front

What is a right triangle?

Back

A right triangle is a triangle that has one angle measuring exactly 90°.

Front

What is an obtuse triangle?

Back

An obtuse triangle is a triangle that has one angle measuring more than 90°.

Front

If a triangle has angles of 30°, 60°, and 90°, what type of triangle is it?

Back

Right triangle.

Front

If a triangle has angles of 45°, 45°, and 90°, what type of triangle is it?

Back

Right triangle.

Front

If a triangle has angles of 50°, 60°, and 70°, what type of triangle is it?

Back

Acute triangle.

Front

If a triangle has angles of 100°, 40°, and 40°, what type of triangle is it?

Back

Obtuse triangle.

Front

What is the sum of the angles in any triangle?

Back

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