Define **Adjacent Angles**:

**AB** and **CD**.

**E**.

is adjacent to

is
adjacent to

is
adjacent to

is
adjacent to

=

and
and ?

**"vertical
angles"**.

Define **Vertical Angles**:

**"linear pair"**.

Define a **Linear Pair of
Angles**:

**AB**.

**C**.

**CD**.

=

and are **"supplementary angles"**.

Define **Supplementary
Angles**:

**ABC**.

**BD** in
the interior of the angle.

=

**D** around the
interior of the right angle, does your conclusion stay the same?

and
are **"complementary angles"**.

Define **Complementary
Angles**:

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