9. area of one traingle will be = 1/2*2.8*4 = 5.6 in^2 5 such triangles will form the pentagon so, area = 5*5.6 = 28 in^210. area of hexagon be divided into 6 equilateral traingles,area of 1 equilateral triangle = sqrt (3)/4 * 20 = 5*sqrt 3 = 173.21 cm^2so, area of hexagon = 6*173.21 = 1039.3 cm^2Please post it again and let me know which answers you need? Please do best my answer, Thanks

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