find the area of polygon ABCD
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Step-by-step explanation:
ANSWER
→ There are three triangles comprising the pentagon
& area of triangle by heron's formula =
s(s−a)(s−b)(s−c)
△
1
a = b = 8 , c = 12
S=
2
8+8+12
=14
△
1
=
14(6)(6)(2)
=6×2
7
△
2
a = b = 12, b = 10
S = 17
△
2
17(5)(5)(7)
=5
119
△
3
a = 10, b = 10, c = 12
S = 16
△
3
=
16(6)(6)(4)
=6×4×2=48
⇒ Total area =48+12
7
+5
119
m
2
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