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kayleahrayne
22.06.2019 •
Mathematics
Given the parallelogram abcd, solve for x when angle a equals (30+ 5x)° and angle d equals (15+10x)° degrees. also, sides ab and cd opposite each other.
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Ответ:
x = 9
Step-by-step explanation:
Adjacent angles A and D are supplementary:
(30 +5x)° +(15 +10x)° = 180°
15x +45 = 180 . . . . . collect terms, divide by °
15x = 135 . . . . . . . . . subtract 45
135/15 = x = 9 . . . . . divide by the coefficient of x
The value of x is 9.
Ответ:
Step-by-step explanation:
n sped