In a parallelogram quadrilateral ABCD, angle A=x° and angle B=(3x+20)°. Find angle c and angle d
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Answer:
A=xº
B=(3x+20)º
opposite angles of a parallelogram are congruent
therefore C=xº
and D=(3x+20)º
adjacent angles of a parallelogram are supplememtary
therefore A+B=180º
xº+(3x+20)º=180º
(4x+20)º=180º
4x=180÷20
4x=9
x=9÷4
x=2.25º
Step-by-step explanation:
hope it will help you out
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