Exercise 16 B composite mathematics grade 8 . Question 1 find the area of the polygon
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Step-by-step explanation:
firstly we find area of ∆ AED
area of ∆ AED=1/2×b×h
= 1/2×6×8
= 24cm^2
now area of TREPEZIUM EBCD
area of Trepezium = 1/2×h(a+b)
( here. a(ED) , b(BC)are parallal side of Trepezium EBCD and h for height)
a(ED) =6 cm
b(BC) = 12 cm
h= 13-8=5cm
= 1/2×5(6+12)
= 1/2×5×18
= 5×9
45 cm^2
total area of figure = area of triangle+ area of Trepezium
= 24+45
=69cm^2
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