Question

triangle abc is an isosceles triangle in which ab=ac Angle BAC is 110 degrees and area of triangle is 85 cm^2 calculate AC

Answer 1

Answer:

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Answer 2

Answer :-

from image we have,

• ∠BAC = 110°
• AB = AC = let a cm .
• ∆ABC area = 85cm² .

so,

→ ∆ABC area = 85 cm² .

→ (1/2) * AB * AC * sin ∠BAC = 85 cm² .

→ (1/2) * a * a * sin 110° = 85

→ a² * sin 110° = 170

→ a² * 0.94 = 170

→ a² = 170/0.94

→ a² = 180.85

→ a = AC = 13.45 cm (Ans.)

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