Finding Missing Angles

Front

What is an angle?

Back

An angle is formed by two rays (sides) that share a common endpoint (vertex).

Front

What is a right angle?

Back

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

Tags

CCSS.4.G.A.1

Front

What is an acute angle?

Back

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

Tags

CCSS.4.G.A.1

Front

What is an obtuse angle?

Back

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

Tags

CCSS.4.G.A.1

Front

What is a straight angle?

Back

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

Tags

CCSS.4.G.A.1

Front

How do you find the missing angle in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees. To find a missing angle, subtract the sum of the known angles from 180.

Tags

CCSS.8.G.A.5

Front

What is the formula for finding the missing angle in a straight line?

Back

The angles on a straight line add up to 180 degrees. To find the missing angle, subtract the known angle from 180.

Tags

CCSS.7.G.B.5

Front

What is the sum of angles in a triangle?

Back

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

Tags

CCSS.8.G.A.5

Front

What is the sum of angles in a quadrilateral?

Back

The sum of the angles in a quadrilateral is always 360 degrees.

Tags

CCSS.HSG.C.A.3

Front

If one angle is 60 degrees, what is the missing angle in a triangle if the other angle is 70 degrees?

Back

The missing angle is 50 degrees (180 - 60 - 70 = 50).

Tags

CCSS.8.G.A.5