Answer:
see explanation
Explanation:
the sum of the 3 angles in Δ ABC = 180°
sum the 3 angles, equate to 180 and solve for x
3x + 3x - 3 + 2x - 1 = 180 ( collect like terms on left side )
8x - 4 = 180 ( add 4 to both sides )
8x = 184 ( divide both sides by 8 )
x = 23
Then
∠ B = 3x - 3 = 3(23) - 3 = 69 - 3 = 66°
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∠ 5 is congruent to ∠ 4 ( vertically opposite angles )
∠ 2 is congruent to ∠ 4 ( alternate angles )