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If an angle differ from its complement by $10^o$, find the angle.
Given:
An angle differs from its complement by $10^o$.
To do:
We have to find the angle.
Solution:
Two angles are said to be complementary if the sum of their measures is $90^o$.
Let the required angle be $x$.
This implies,
The measure of the complementary angle is $x-10^o$ or $x+10^o$
Therefore,
$x+(x-10)^o=90^o$ or $x+(x+10)^o=90^o$
$2x-10^o=90^o$ or $2x+10^o=90^o$
$2x=90^o+10^o$ or $2x=90^o-10^o$
$2x=100^o$ or $2x=80^o$
$x=\frac{100^o}{2}$ or $x=\frac{80^o}{2}$
$x=50^o$ or $x=40^o$
The measure of the required angle is $50^o$ or $40^o$.
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