Triangles-Missing Angles

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 the third angle if two angles of a triangle are 50 degrees and 60 degrees?

Back

The third angle measures 70 degrees.

Front

In a triangle, if one angle measures 45 degrees and another measures 45 degrees, what is the measure of the third angle?

Back

The third angle measures 90 degrees.

Front

What is the relationship between the angles in an isosceles triangle?

Back

In an isosceles triangle, the angles opposite the equal sides are equal.

Front

If a triangle has angles measuring 30 degrees and 60 degrees, what is the measure of the third angle?

Back

The third angle measures 90 degrees.

Front

What is the formula to find the missing angle in a triangle?

Back

The formula is: Missing angle = 180 - (angle1 + angle2).

Front

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

Back

The third angle measures 70 degrees.

Front

What is the measure of an exterior angle of a triangle?

Back

An exterior angle is equal to the sum of the two opposite interior angles.

Front

If x is an angle in a triangle and the other two angles are 50 degrees and 60 degrees, how do you find x?

Back

x = 180 - (50 + 60) = 70 degrees.