Question

The area of the triangle formed by the points (-3,-2).(5, -3) and (9, 12)​

Answer 1

Step-by-step explanation:

(-3,-2),(5,-3) and(9,12)

x1= -3, x2=5, x3=9

y1=-2, y2= -3, y3=12

|∆|=|1/2|x1(y2-y3)+x2(y3-y1)+x3(y1-y2)

substitute the values

|∆|=|1/2| -3(-3-(+12))+5(12-(-2))+9(-2-(-3))

|∆|=|1/2| -3(-15)+5(14)+9(1)

|∆|=|1/2| 45+70+9

|∆|=|1/2| 124

|∆|=124/2

|∆|=62

So, the area of the triangle is 62cm^2.

I hope you understand and it's helpful to you.