Any two angles whose sum is 180 degrees. Supplementary Angles.

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Presentation transcript:

Any two angles whose sum is 180 degrees. Supplementary Angles

70+x=180 x=110 Example:

Complementary Angles Any two angles whose sum is 90 degrees.

Example: x+(x+30)=90 2x+30=90 2x=60 x=30

Two angles across from each other on intersecting lines. They are always congruent! Vertical Angles

Examples: b= ____ degrees

Adjacent Angles Two angles that are next to each other and share a common side.

Example: Common side

Linear Pair Two angles that are adjacent and supplementary. They form a straight line!

Example: 9x+3x=180 12x=180 X=15

Evaluation 1)What is the value of x? A.84 degrees B.24 degrees C.21 degrees D.62 degrees

Evaluation 1)What is the value of x? A.66 degrees B.132 degrees C.21 degrees D.52 degrees

Evaluation 1)What is the value of x? A.66 degrees B.55 degrees C.21 degrees D.12 degrees