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5 April, 20:38

M∠1=45° and m∠3=65°

What is m∠4?

2. In right △ABC with right angle B, m∠A = (3x-8) ° and m∠C = (x-2) °.

What is m∠A?

47°

67°

25°

92

+1
Answers (2)
  1. 5 April, 20:46
    0
    In Right Δ ABC with right angle B,

    ∠A = (3 x - 8) °, ∠B=90°, ∠C = (x-2) °

    ∠A+∠B+∠C=180°[∠ sum property of triangle]

    3 x-8+90 + x-2=180

    Adding and subtracting like terms

    4 x-10+90=180

    4 x+80=180

    4 x=180-80

    4 x=100

    x=100/4

    x=25°

    ∠A=3*25-8=75-8=67°
  2. 5 April, 23:39
    0
    Do you know the answer to number one?
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