Solving Right Angles w/1 and 2 step equations

What do we call this angle?

• Right Angle

• Correct Angle

• Left Angle

• Wrong Angle

Tags

CCSS.4.G.A.1

How many degrees does a right angle have?

• 120 degrees

• 45 degrees

• 90 degrees

• 60 degrees

Tags

CCSS.4.G.A.1

This right angle was measured at 10 times whatever x is.

If I wanted to solve for x, what would be a good equation to figure that out?

• 10 + 90 = x

• 10x = 90

• x - 9 = 100

• 9x = 10

Tags

CCSS.7.G.B.5

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