7.1 May 3

7.1 May 3

By Laura Plasschaert

Angle Review

Angle Types

Finding missing angle measures

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​If 70 degrees and x are vertical angles, then that means they must have the same measurement. Therefore, x is equal to 70 degrees.

Multiple Choice

What is the measurement of the angle?

• 22

• 128

• 90

• 180

Finding missing measures

These angles are adjacent and on a straight line, and we know that straight lines are 180 degrees. Therefore, 117 + x must equal 180. To solve this, we can take 180-117=63.

Multiple Choice

What is the measurement of the missing angle?

• 105

• 90

• 85

• 95

Using equations to find missing angles

​We know that 7x and (x+20) are adjacent angles, and they are on a straight line. We know that straight lines are 180 degrees. Therefore, 7x+(x+20)=180.

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What would x equal?​

Using equations to find missing angles.​

Since 75 and (4x-25) are vertical angles, we know that they are equal to each other. We can set them equal to each other and then solve for x.

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What is the value of x?​

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