The sides of a triangle are 7 cm, 9 cm and 14 cm. Its area is
A$12 \sqrt{5} cm^2$
B$12 \sqrt{3} cm^2$
C$24 \sqrt{5} cm^2$
D$63 cm^2$
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A$12 \sqrt{5} cm^2$
A
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In a scalene triangle, one side exceeds the other two sides by 4 cm and 5 cm respectively and the perimeter of the triangle is 36 cm . The aren of triangle is