find the area of a triangle whose sides are 8 cm , 11 cm and 13 cm
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Step-by-step explanation:
Perimeter =8+11+x
19+x=32
x=13
S=
2
32
=16
Heron's formula
A=
S(S−A)(S−B)(S−C)
=
16(16−8)(16−11)(16−13)
=
16×8×5×3
=8
30
cm
2
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