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Q19.

Expert-verifiedFound in: Page 689

Book edition
Common Core Edition

Author(s)
Ron Larson, Laurie Boswell, Timothy D. Kanold, Lee Stiff

Pages
183 pages

ISBN
9780547587776

The figure is shown below.

**If two angles formed at the intersection point of two lines are opposite to each other, then the measures of the angles, called as vertical angles, are equal.**

**$\angle 1$ **has the same measure as its opposite angle. Since the angle opposite to $\angle 1$ has a measure of $65\xb0$, write,

$m\angle 1=65\xb0$

The measure of the angle that is vertical to an angle measuring $65\xb0$ is $65\xb0$.

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