Triangle Theorems

Front

What is the Triangle Sum Theorem?

Back

The Triangle Sum Theorem states that the sum of all angles in a triangle is always 180°.

Front

What is the measure of angle x if the other two angles are 45° and 60°?

Back

Angle x = 75°.

Front

What do you call the longest side of a right triangle?

Back

Hypotenuse.

Front

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

Back

Right triangle.

Front

What is the measure of each angle in an equilateral triangle?

Back

Each angle measures 60°.

Front

What is the relationship between the angles in a triangle?

Back

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

Front

If two angles of a triangle are 70° and 40°, what is the measure of the third angle?

Back

The third angle measures 70°.

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

What is the formula to find the area of a triangle?

Back

Area = 1/2 * base * height.

Front

What is the measure of angle x if the other two angles are 66° and 48°?

Back

Angle x = 66°.