Question

grade 9 math herons formula
Q: how did they got the answer as
$8 \sqrt{30}$
can any one explain in their own words plsss tomorrow is my examm

Answer 1

hey mate here is your answer..
perimeter means the sum of three sides...so
8+11+X=32
19+X=32
X=32-19
X=13
so as per the herons formula S=(a+B+c)/2
S=(8+11+13)/2
S=32/2
S=16
by putting the herons area of triangles formula your answer will be8√30

hope it may help you