Find the area of the triangle; AB = 5, BC = 8 and ∠CAB = 60

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A20√3

B10√3

C15√3

D12

Answer:

Using the SAS are formula

Area = 1/2 × (side 1 ) x (side 2) × sin(included angle)

= 1/2 × 5 ×8 x sin60

= 20 × √3/2

= 10√3 sq units

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