Find the area of the triangle If necessary round the answer

Find the area of the triangle. If necessary, round the answer to two decimal places. A = 83 degree, b = 9, c = 6 27.01 53.60 26.80 3.29 a = 4, b = 5, c =7 16.01 10.01 3.46 9.60

Solution

b =9 and c=6 A = 83 deg

Area = (1/2)b*c*sinA = (1/2)*9*6*sin83 = 26.79 = 27 (rounding off)

Option A)

a= 4 ; b = 5; c =7

Area = sqrt(s(s-a)(s-b)(s-c)

s= (a+b+c)/2

s = (4 +5+7) /2 = 8

Area = sqrt(8(8-4)(8-5)(8-7) = sqrt(8*4*1) = sqrt12

= 3.46

Option C