Asked by jun
ABC is an isosceles triangle. AB=BC=6. Angle ABC=120,AC=a square root of b. What is a+b?
Answers
Answered by
Steve
Drop an altitude from B to D on AC. Then triangles ABD and CBD are 30-60-90 right triangles.
AD = DC = 3√3
so, AC = 6√3
a+b = 9
AD = DC = 3√3
so, AC = 6√3
a+b = 9
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