Question

find the area of the quadrilateral whose vertices taken in order are
A(-5,7) B(-4,-5) C(-1,-6) D(4,5)

Answer 1

For finding the area of quadrilateral ABCD, join AC. Area of two obtained triangles can be found out by using the formula .

Area of triangle ABC = square unit

Area of triangle ADC = square unit

∴ Area of quadrilateral ABCD = Area of triangle ABC + Area of triangle ADC = square unit = 72 square unit