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=20×16=320
area of ∆= ½B×h
½×20×8=80
area of fig =320+80=400in²
base = 20 in.
height = 16 in.
Area = 16x20 = 320 in.²
For triangle,
height = 8 in.
base = 20 in. (Opposite sides of a parallelogram are equal)
Area = 1/2x8x20 = 80 in.²
Total area = 320+80 = 400 in.²