Question

In the given figure, the area of the triangle ABC
is
(A)13.24 cm sq.
(B)12.28 cm sq.
(C)11.32 cm sq.
(D) 15.37 cm sq.
​

Answer 1

Answer:

c is the correct answer of this question

Answer 2

Solution

half of perimeter is =(11+4+8)/2=23/2

now area...

$= \sqrt{ \frac{23}{2} ( \frac{23}{2} - 11)( \frac{23}{2} - 8)( \frac{23}{2} - 4) } \\ = \sqrt{ \frac{23}{2} \times \frac{1}{2} \times \frac{7}{2} \times \frac{15}{2} } \\ = \frac{ \sqrt{2415} }{2 \times 2} \\ = \frac{ \sqrt{2415} }{4} \\ = 12.28(almost)$