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Mathematics
Problem
If the difference between the semi-perimeter and the sides of a
Δ
A
B
C
\Delta ABC
Δ
A
B
C
are 8 cm, 7 cm and 5 cm respectively, then find the area of the triangle. A.
20
7
20\sqrt{7}
20
7
cm
2
\text{cm}^2
cm
2
B.
10
14
10\sqrt{14}
10
14
cm
2
\text{cm}^2
cm
2
C.
20
14
20\sqrt{14}
20
14
cm
2
\text{cm}^2
cm
2
D.
140
140
140
cm
2
\text{cm}^2
cm
2
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