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Sk8terkaylee
18.12.2020 •
Mathematics
I need help with this please
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Ответ:
x=21 interior angle =150 exterior angle=210
Step-by-step explanation:
to find the angle rule=(n-2)×180
n is the number of sides in the polygon
(12-2)×180=1800
1800/12=150 (this is the interior angle)
7x+3=150
x=21
exterior angle = 360-150=210
Ответ:
4) k(7k+9)
5) (x+5)(x-5)
Step-by-step explanation:
4) k(7k+9)
5) (x+5)(x-5)