3 years ago

I really need help. thank you

Mathematics

1 answer:

SSSSS [86.1K]3 years ago

4 0

Answer:

90+5x+x+10=180(interior angle of triangle)

100+6×=180

6x=180-100

6x=80

$x = \frac{80 }{6} \\ x = \frac{40}{3} \\ now \\ 5x = 5 \times \frac{40}{3} \\ = \frac{200 }{3} \\ = 66 \frac{2}{3} \\ a = 5x = \ 66 \frac{2}{3}$

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