How do you find the area of a triangle given A=18, B=35, c=3.4?

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Answer 1 · 2018-05-25T04:08:16

$color(purple)(A_t = 3.31$ sq units

$hat A = 18^@, hat B = 35^@, c = 3.4$

$hat C = (180-18-35) = 127^@$

As per Law of Sines,

$a / sin A = b / sin B = c / sin C$

$b = (c * sin B) / sin C$

$b = (3.4 * sin 35) / sin 127 = 2.44$

Area of triangle - $A_t = (1/2) b c sin A$

$A_t = (1/2) * 2.44 * 3.4 * sin (127)$

$color(purple)(A_t = 3.31$ sq units

How do you find the area of a triangle given A=18*, B=35*, c=3.4?