Solving Straight Angles with 1 and 2 step equations

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

What does it mean for two angles to be supplementary?

Back

Two angles are supplementary if the sum of their measures is 180 degrees.

Tags

CCSS.7.G.B.5

Front

How do you set up an equation for supplementary angles?

Back

To set up an equation for supplementary angles, add the measures of the two angles and set the sum equal to 180 degrees.

Tags

CCSS.7.G.B.5

Front

If one angle measures 60 degrees and the other is represented as 20x, what equation can be formed?

Back

The equation is 20x + 60 = 180.

Tags

CCSS.7.G.B.5

Front

How do you solve the equation 20x + 60 = 180 for x?

Back

Subtract 60 from both sides to get 20x = 120, then divide by 20 to find x = 6.

Tags

CCSS.7.EE.B.4A

Front

What is the equation for a straight angle measuring 10x?

Back

The equation is 10x = 180.

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

Front

How do you solve the equation 10x = 180 for x?

Back

Divide both sides by 10 to find x = 18.

Tags

CCSS.6.EE.B.7

Front

If a straight angle is represented as 5y + 160 degrees, what equation can be formed?

Back

The equation is 5y + 160 = 180.

Tags

CCSS.7.G.B.5

Front

How do you solve the equation 5y + 160 = 180 for y?

Back

Subtract 160 from both sides to get 5y = 20, then divide by 5 to find y = 4.

Tags

CCSS.7.EE.B.4A

Front

What is the first step in solving a linear equation?

Back

The first step is to isolate the variable on one side of the equation.

Tags

CCSS.7.EE.B.4A