Question

Calculate the area of the triangle whose vertice are (5 , 2) , (4 , 7) and (7 , -4).​

Answer 1

Answer:

To find the area of a rectangle, multiply its height by its width. For a square you only need to find the length of one of the sides (as each side is the same length) and then multiply this by itself to find the area. This is the same as saying length2 or length squared.

Answer 2

Step-by-step explanation:

A=1÷2[5(2-7)+4(7+4)+7(-4+2)]

A= [5(-5)+4(11)+7(-2)

A=1÷2[-25+44-14]

A=1÷2[-39+44]

A=1÷2(5)

A=5÷2

A=2.5