Question

According to Heron's Formula, if the lengths of the sides of a triangle are a, b and c, and s= (a + b + c)/2,

then the area, A, is given by the formula: A = √s(s-a) (s-b) (s-c). Find the area of a triangle whose
sides are 6ft, 7ft and 11ft.
O A = 21.1 ft²
O A = 18.4 ft²
OA = 19.0 ft²
O A = 20.0 ft²

Answer 1

19.0 ft^2.

Explanation:

s = (6 + 7 + 11)/2

= 12

--> A = √[12(12-6)(12-7)(12-11)]

= √(12 * 6 * 5 * 1)

= √360

= 18.97

Answer 2

Hello,

answer C: 19.0ft (rounded to 1 digit)

Explanation:

`s=(6+7+11)/(2) =12\\\\A=√(12*6*5*1) =√(360)= 18,97366596...\approx{19.0}\ (ft^2)`