Question

mid point of triangle are p(-1,1) m(1,1) n(0,2) find area of triangle

Answer 1

Answer:

1 Cm2

Step-by-step explanation:

let p[-1,1]⇒[X1, Y1]

    m[1,1]⇒[X2 ,Y2]

    n[0,2]⇒[X3, Y3]

• Δ=1/2║X1[Y2 - Y3]+ X2[Y3 -Y1]+ X3[Y1-Y2]║
•   =1/2║-1[1 - 2]+ 1[2- 1]+ 0[1-1]║
•   =1/2║-1[-1]+ 1[1]+0║
•   =1/2║1+1║
•   =1/2║2║
•   =1 Cm2