Question

the cordinates of the three verices of a triangle are A(-1,1) B(2,5) and C(5,1) find the area and perimeter of the triangle...

Answer 1

Are you familiar with vectors?

Answer 2

no not really

Answer 3

You don't need vectors to figure this out. Just grab some graphing paper and plot the points. Find the distance between A and C. That will give you the base. Then find the point that is halfway between A and C. Label it M. Then find the distance between M and B. That will be your height. Then use A = .5(bh)

Answer 4

(@Hero , I agree. It just makes computation easier.) Anyway, the diagram is not representative of where the points actually are in the plane. The point is that the perimeter is sum of the distances.



The area can be given by...it seems that @Hero 's got it...

Answer 5

AREA=12
PERIMETER=16

Answer 6

Whose diagram is not representative of where the points are in the plane?

Answer 7

Mine.

Answer 8

Thanks @hell.i-care for providing the answer only with out showing any steps whatsoever as to how you arrived at that. Giving answers only doesn't help anyone learn anything.

Answer 9

thanks you guys