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adell [148]
3 years ago
8

If m∠1 = 3x, m∠3 = 2x + 20 and m∠5 = 30, what is the value of x?

Mathematics
1 answer:
iogann1982 [59]3 years ago
6 0
M∠2 = 180 - m∠1 = 180 - 3x   [supplementary angles<span>]

</span>In a triangle, the three interior angles always add to 180° ⇒
m∠2 + m∠3 + m∠5 = 180 <span>
180-3x + 2x+20 + 30 = 180
230 - x = 180
x = 230 - 180
x = 50</span>
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