Question

Find the area of the triangle where AB= 4, BC = 6, ∠CAB = 120

• A. 12
• B. 6√3
• C. 8√3
• D. 10

Answer 1

Answer:

B. 6√3

Area = 1/2 × ab × sinx : x< 90

= 1/2 × ab × sin(180 - x) : x>90

= 1/2 × 4 × 6 × sin (180 - 120)

= 1/2 × 24 × sin 60

= 12 ×√3/2

= 6√3