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Mathematics, 06.11.2020 17:50 Serenitybella

Triangle ABC is isosceles. The vertex angle,∠B, is four times the size of the base angles. Which of the following are true? A. m∠B= 60°
B. m∠B= 120°
C. m∠A= 30°
D. m∠A= 60°
E. m∠C= 60°
F. m∠C= 30°

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Triangle ABC is isosceles. The vertex angle,∠B, is four times the size of the base angles. Which of...
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