Angles Infor & Angle Addition Postulate

Front

What is an acute angle?

Back

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

Front

What is an obtuse angle?

Back

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

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Front

What is the Angle Addition Postulate?

Back

The Angle Addition Postulate states that if point S is in the interior of angle TRQ, then m∠TRQ = m∠TRS + m∠SRQ.

Front

If m∠TRS = (4x)° and m∠SRQ = (7x)°, what is m∠TRQ if it equals 88°?

Back

x = 8.

Front

What is the sum of the angles in a triangle?

Back

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

Front

What is a ray in geometry?

Back

A ray is a part of a line that starts at a point and extends infinitely in one direction.

Front

What is the vertex of an angle?

Back

The vertex of an angle is the point where the two rays meet.

Front

If m∠ABC = 103°, what is the measure of the supplementary angle?

Back

The supplementary angle is 77°.