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25-04-2018
Mathematics

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Find the value of x. The diagram is not to scale.
A. x = 15
B. x = 21
C. none of these
D. x = 60

Find the value of x The diagram is not to scale A x 15 B x 21 C none of these D x 60 class=

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SINAZEUS SINAZEUS

25-04-2018

B is the correct answer

this triangle is a isosceles triangle. so angle R is equal to angle T.

and

U + T = 180

so the answer is :
[tex]5x - 30 + 5x = 180 \\ 5x + 5x = 180 + 30 \\ 10x = 210 \\ x = 21[/tex]

good luck

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