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Slide 1

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Adjacent Angles
Adjacent angles have a common vertex and a common arm.
They are joined together ( adjacent means `next to' ).
In the example above:
ADB and BDC are adjacent.
D is the common vertex.
BD is the common arm.…read more

Slide 2

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Complementary Angles
Two angles that add up to 90°.
Adjacent complementary angles form a right angle.
The complement of an angle is what needs to be added to an
angle to get 90°.
For example, the complement of 20° is 70° ( since 20° + 70°
= 90° ).…read more

Slide 3

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Supplementary Angles
Two angles that add up to 180°.
Adjacent supplementary angles form a straight angle.
The supplement of an angle is what needs to be added to an
angle to get 180°.
For example, the supplement of 20° is 160° ( since 20° + 160°
= 180° ).…read more

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