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Question

In quadrilateral ABCD, if A=60 and B: C: D=2:4:6, then find the measure of C.

A
90
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B
100
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C
110
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D
120
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Solution

The correct option is B 100
Let B=2x, C=4x and D=6x
Sum o angles in a quadrilateral is 360
A+ B+ C+ D=360
60+2x+4x+6x=360
12x=36060
12x=300
x=25
So,
C=4x=4×25=100

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