Question

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Answer 1

Step-by-step explanation:

a) Area of 1st triangle=1/2×8×10=40 cm^2

Area of 2nd triangle=1/2×4×10=20 cm^2

Area of shaded region=40+20=60 cm^2

b) PE=EO=6cm

MD=6 cm

Area of ∆MDN=1/2×12×6=36 cm^2

Area of ∆DPE=1/2×9×6=27 cm^2

Area of ∆NOE=1/2×15×6=45 cm^2

Area of square=12×15=180 cm^2

Area of shaded region=180-(45+27+36)=72 cm^2