(i) Divide the following polygons (Fig 11.17) into parts (triangles and trapezium) to find out its area.
FI is a diagonal of polygon EFGHI NQ is a diagonal of polygon MNOPQR
Area of polygon EFGHI = area of EFI + area of quadrilateral FGHI
Draw a diagonal FH
Area of polygon EFGHI = area of EFI + area of FGH + area of FHI
Area of polygon MNOPQR = area of quadrilateral NMRQ+area of quadrilateral NOPQ
Draw diagonal NP and NR .
Area of polygon MNOPQR = area of NOP+area of NPQ +area of NMR +area of NRQ