Answer :

8.) Triangle is a right triangle. Sum of the other two angles of a right triangle is 90.
8x + 2 + 9x + 3 = 90
17x = 90 - 5 = 85
x = 85/17 = 5
x = 5

Measure of angles are:
8(5) + 2 = 40 + 2 = 42 and
9(5) + 3 = 45 + 3 = 48

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