SOLUTION: Δ ABC is isosceles. Angles B and C are congruent. The m∠A = 40°, m∠B = (3x + 1)°. Find x.

Algebra ->  Triangles -> SOLUTION: Δ ABC is isosceles. Angles B and C are congruent. The m∠A = 40°, m∠B = (3x + 1)°. Find x.       Log On


   

Question 962467: Δ ABC is isosceles. Angles B and C are congruent. The m∠A = 40°, m∠B = (3x + 1)°. Find x.
Answer by stanbon(75887) About Me  (Show Source):
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Δ ABC is isosceles. Angles B and C are congruent. The m∠A = 40°, m∠B = (3x + 1)°. Find x.
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In an isosceles triangle congruent angles must be equal in measure.
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Equation:
3x+1 = 40
3x = 39
x = 13
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Cheers,
Stan H.
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