Solving Straight Angles with 1 and 2 step equations

What is this kind of angle called?

• Right

• Straight

• Acute

• Obtuse

How many degrees are in a straight angle?

• 180

• 90

• 360

• 100

I have a straight angle. The angle measures 10x. What equation would I set up to find the value of x?

• x = 180

• 10x = 90

• 10x = 180

• 10 + x = 100

Tags

CCSS.6.EE.B.7

I have a straight angle. The angle measures 10x. I can use the equation

10x = 180

Find x.

• x = 10

• x = 170

• x = 18

• x = 40

Tags

CCSS.6.EE.B.7

This straight angle was measured at 5y + 160 degrees. What equation would we use to find the value of y?

• 5y + 160 = 90

• 160 = 180

• 5y = 160

• 5y + 160 = 180

Tags

CCSS.7.EE.B.4A

This straight angle was measured at 5y + 160 degrees. We can use the equation

5y + 160 = 180

Find the value of y

• y = 180

• y = 4

• y = 68

• y = 20

Tags

CCSS.6.EE.B.6

These two angles are supplementary (they combine to make a straight angle). One angle is 60 degrees, the other is 20x degrees. What equation could we set up if we want to solve for x?

• 20x + 60 = 90

• 20x = 60

• 20x + 60 = 180

• 80x = 180

Tags

CCSS.7.EE.B.4A

These two angles are supplementary (they combine to make a straight angle). One angle is 60 degrees, the other is 20x degrees.

We can use the equation:

20x + 60 = 180

Solve for x

• x = 6

• x = 120

• x = 100

• x = 20

Tags

CCSS.6.EE.B.6

These two angles are supplementary (they combine to be a straight angle). All we know is that one angle is 4 times larger than the other angle.

What equation could we use to figure out what y equals?

• 5y = 100

• y = 4y

• 4y + y = 180

• 4y + y = 90

Tags

CCSS.6.EE.B.7

These two angles are supplementary (they combine to be a straight angle). All we know is that one angle is 4 times larger than the other angle.

We can use the equation:

4y + y = 180

Find the value for y

• y = 36

• y = 18

• y = 144

• y = 20

Tags

CCSS.8.EE.C.7B