Question 1 - answer B
vertices of triangle are (4,-2), (1,-5) and (-3,5)
Area of triangle with vertices (x1,y1), (x2,y2) and (x3,y3)
= mod[ 1/2 { x1(y2 - y3) + x2(y3 - y1) + x3(y1 - y2) } ]
on inserting the values, we get
area of triangle = 21 unit^2
Question 2- answer A
coordinates of D = (7,1)
To find distance from origin, we can use distance formula
Distance = sqrt [ ( x1 - x2 )^2 + ( y1 - y2 )^2 ]
Distance = sqrt[ ( 7-0 )^2 + ( 1-0 )^2 ]
Distance = 7.07 units
