Triangles

Front

What is an acute triangle?

Back

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

Front

What is the sum of the angles in any triangle?

Back

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

Front

What defines a right triangle?

Back

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

Front

What is an obtuse triangle?

Back

An obtuse triangle is a triangle where one angle is greater than 90°.

Front

If two angles in a triangle measure 30° and 105°, what is the measure of the third angle?

Back

The third angle measures 45°.

Front

If two angles in a triangle measure 18° and 60°, what is the measure of the third angle?

Back

The third angle measures 102°.

Front

What is a scalene triangle?

Back

A scalene triangle is a triangle where all three sides and all three angles are different.

Front

What is an equilateral triangle?

Back

An equilateral triangle is a triangle where all three sides and all three angles are equal.

Front

How can you identify an acute triangle?

Back

An acute triangle can be identified if all its angles are less than 90°.

Front

What is the relationship between the angles in a triangle?

Back

The angles in a triangle must add up to 180°.