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If angle C is 48 and angle B is 11x-5 and angle A is 9x-3, Find angle A.

If angle C is 48 and angle B is 11x-5 and angle A is 9x-3, Find angle A.-example-1

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Answer:

60°

Explanation:

The sum of interior angles in a triangle is equal to 180°.

  • To find the measure of m∠A, we can write the following equation based on the above mentioned information:

48° + 11x - 5 + 9x - 3 = 180°

  • Add like terms.

40° + 20x = 180°

  • Subtract 40 from both sides.

20x = 140°

  • Divide both sides with 20.

x = 7

To find m∠A, replace x with 7:

m∠A = 9x - 3

9×7-3 = 60°

User Marco Lackovic
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