15 Find the measures of the angles in the given figure.
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in here
sum of all angles is 360°
so
(2a + 5) + (a) + (2a- 25) + (a + 15) + ( a -6) = 360
2a + 5 + a + 2a - 25 + a + 15 + a - 6 = 360
7a - 11 = 360
7a = 371
a = 371/7
a = 53 ✓
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