Angles Two Step Equations

This right angle can be expressed by the equation:

10x = 90

Solve for x.

• x = 1

• x = 9

• x = 90

• x = 10

Tags

CCSS.7.G.B.5

This right angle has the angle 2y + 70. If I wanted to figure out what y is equal to, what equation would I use?

• 70 = 90

• 2y = 90

• 2y + 70 = 90

• 2y + 70 = 100

Tags

CCSS.7.G.B.5

This right angle has the angle 2y + 70. So I can use the equation

2y + 70 = 90

Solve for y.

• y = 80

• y = 90

• y = 70

• y = 10

Tags

CCSS.7.G.B.5

These two angles are complementary (they combine to be a right angle). One angle has a measurement of x. The other angle is exactly 4 times larger (4x). What equation could we use to solve for x?

• 4x + x = 90 .... or just 5x = 90

• 4x = x

• 90 + 4x = x

• x = 90

Tags

CCSS.7.G.B.5

These two angles are complementary (they combine to be a right angle).

One angle has a measurement of x. The other angle is exactly 4 times larger (4x).

We can use the equation 4x + x = 90 which can simplify to

5x = 90

Solve for x.

• x = 18

• x = 5

• x = 90

• x = 20

Tags

CCSS.7.G.B.5

These two angles are complementary (they combine to be a right angle). One of the angles we measured at 60 degrees. We don't know the other angle (we just called it y). What equation could we use to figure out the second angle?

• y = 60

• y + 60 = 90

• 90 + 60 = y

• y + 90 = 60

Tags

CCSS.7.G.B.5

These two angles are complementary (they combine to be a right angle).

One of the angles we measured at 60 degrees. We don't know the other angle (we just called it y).

We can use the equation: y + 60 = 90 to find the answer.

Solve for y

• y = 30

• y = 60

• y = 90

• y = 150

Tags

CCSS.7.G.B.5

From the picture we determine that:

2x + 2 = 32

Solve for x

• x = 17

• x = 15

• x = 60

• x = 8

Tags

CCSS.7.G.B.5

This angle is 140 degrees. It can also be expressed as 5y + 40 degrees. What would be a good equation to set up if I wanted to solve for y?

• 5y + 40 = 90

• 5y + 40 = 180

• 5y + 40 = 140

• 5y = 40

Tags

CCSS.7.G.B.5

We don't know the what x equals but we do know that this angle is 36 degrees. Based on the information from the picture, what equation should we use?

• 2x = 36

• 2x + 36 = 90

• 36 = x

• 2 = 36

Tags

CCSS.7.G.B.5