Does anyone know the answer to this problem?
1 answer:
Start with the fact that the sum of the angles in a triangle is 180°. .. ∠A +∠B +∠C = 180 .. 65 +(3x -10) +(2x) = 180 . . . . . . substitute the given information .. 55 +5x = 180 . . . . . . . . . . . . . . . collect terms .. 11 +x = 36 . . . . . . . . . . . . . . . . . . divide by 5* .. x = 25 . . . . . . . . . . . . . . . . . . . . . subtract 11 ∠B = 3x -10 = 3*25 -10 = 65 ∠C = 2x = 2*25 = 50 _____ In summary .. x = 25 .. ∠B = 65° .. ∠C = 50° ___ * You could subtract 55, then divide by 5. You get the same answer either way. I find it easier to work with smaller numbers, and dividing all these values by 5 is fairly easy.
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