Question

in fig.ABCD is a rectangle with sides AB=10cm and AD=5cm.find the area of EFG

Answer 1

we know that if a triangle and a parellelogram are on the same base and between the same parallel lines then the area of the triangle is half of the area of the parallelogram.
rectangle ABCD and triangle GEF are on the same base and between the same parallel lines.
area of GEF = half of area of rectangle ABCD
                  =1/2 AD CD
                  = 1/2 10*5
                   = 25cm^2

Answer 2

area of EFG = half of area of rectangle ABCD
                  =1/2 AD* CD
                  = 1/2 10*5
                   = 25cm^2