Question

Can somebody pls help me​

Answer 1

Hi,

Explanation:

Half perimeter is 38/2=19

since |BC|=9 so |AB|=19-9=10.

If you put A on the right of B, abs(D) will be positive.

We must put A on the left of B and p=-3-10=-13

For question b:

It is possible to find area of ABP = |AB|*|BC|/2=10*9/2=45