Angles of Triangles

Front

What is an obtuse triangle?

Back

A triangle with one angle measuring more than 90°.

Front

What is a scalene triangle?

Back

A triangle with all sides of different lengths.

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

What is a right triangle?

Back

A triangle with one angle measuring exactly 90°.

Front

What is the sum of the angles in a triangle?

Back

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

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

How do you classify a triangle based on its angles?

Back

Triangles can be classified as acute (all angles < 90°), right (one angle = 90°), or obtuse (one angle > 90°).

Front

How do you classify a triangle based on its sides?

Back

Triangles can be classified as scalene (all sides different), isosceles (two sides equal), or equilateral (all sides equal).

Front

If one angle of a triangle is 90°, what type of triangle is it?

Back

It is a right triangle.