Triangle Angles - A

Front

What is the sum of the interior angles of a triangle?

Back

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

Front

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

Back

It is a right triangle.

Front

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

Back

Each angle in an equilateral triangle measures 60 degrees.

Front

What is the relationship between the angles in a triangle?

Back

The sum of the angles in a triangle is equal to 180 degrees.

Front

If two angles of a triangle are known, how can you find the third angle?

Back

Subtract the sum of the known angles from 180 degrees.

Front

What is an isosceles triangle?

Back

An isosceles triangle has at least two sides that are equal in length.

Front

What is the exterior angle theorem?

Back

The exterior angle of a triangle is equal to the sum of the two opposite interior angles.

Front

How do you calculate the measure of an angle in a triangle using the sine rule?

Back

The sine rule states that a/sin(A) = b/sin(B) = c/sin(C), where a, b, and c are the sides opposite angles A, B, and C respectively.

Front

What is the Pythagorean theorem?

Back

In a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides (a² + b² = c²).

Front

What is the definition of complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.