Missing Angles in Triangles

Front

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

Back

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

Front

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

Back

You can find the third angle by subtracting the sum of the known angles from 180 degrees.

Front

What is the measure of the missing angle if one angle is 90 degrees and another is 45 degrees?

Back

The missing angle measures 45 degrees.

Front

In a triangle, if one angle measures 60 degrees and another measures 30 degrees, what is the third angle?

Back

The third angle measures 90 degrees.

Front

What is the relationship between the angles in a right triangle?

Back

In a right triangle, one angle is 90 degrees, and the sum of the other two angles is 90 degrees.

Front

How do you calculate the measure of an angle when given an equation involving x?

Back

You solve the equation for x and then substitute back to find the angle's measure.

Front

What is the definition of an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is the definition of an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Front

If a triangle has angles measuring 50 degrees and 60 degrees, what is the measure of the third angle?

Back

The third angle measures 70 degrees.

Front

What is the formula for finding the missing angle in a triangle?

Back

The formula is: Missing Angle = 180 - (Angle 1 + Angle 2).