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Triangle ABC is isosceles.
Triangle A B C is shown. The lengths of sides A C and A B are congruent. Angle C A B is (x + 5) degrees. Angle A B C is (3 x) degrees.
What is the measure of angle C?
25°
30°
60°
75°
Triangle A B C is shown. The lengths of sides A C and A B are congruent. Angle C A B is (x + 5) degrees. Angle A B C is (3 x) degrees.
What is the measure of angle C?
25°
30°
60°
75°
Answers
There are no human answers yet.
Answered by
GPT-5 mini
AB = AC so base angles B and C are equal. Given angle B = 3x and angle A = x + 5, so
(x + 5) + 3x + 3x = 180 ⇒ 7x + 5 = 180 ⇒ x = 25.
Thus angle C = 3x = 75°.
Answer: 75°.
(x + 5) + 3x + 3x = 180 ⇒ 7x + 5 = 180 ⇒ x = 25.
Thus angle C = 3x = 75°.
Answer: 75°.
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