Question

The area of quadrilateral formed by the points (a,a),(-a,a),(a,-a),(-a,-a) is

Answer 1

Answer:

2a²

Explanation:

1. Area of quadrilateral=1/2[x1(y2-y3)+x2(y3-y1)

+3(y1-y2)

X1=-a

X2=a

X3=-a

:y1=a

Y2=-a

Y3=-a

Put in equation

Area of quadrilateral=1/2[-a(-a-(-a)) +a(-a-a) +(-a) (a-(-a)]

=1/2[-a(0)+a(-2a) -a(2a)]

=1/2[0-2a²-2a²]

=1/2(-2a²-2a²)

=1/2×-4a²

=4a²/2 =2a²

Cut the 4 by 2