Question

A triangle shaped glass with vertices at a(-5,-4)b(1,6)c(7,-4)has to be painted if one bucket of paint covers 6 square feet how many buckets of paint will be required to paint the whole glass give one of coat of paint is applied

Answer 1

Answer:

1/2 [x1(y1-y2)x2(y3-y1)x3(y1-y2)