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find the area of a triangle with sides of 12 cm, 15 cm, and 18 cm.
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the area of a triangle with sides of 12 cm, 15 cm, and 18 cm can be found using the heron's formula. the formula is a=sqrt(s(s-a)(s-b)(s-c)), where a, b, and c are the sides of the triangle and s is the semiperimeter. in this case, s =12+15+18 =45, so the area is a=sqrt(45(45-12)(45-15)(45-18)) = 90 sq cm.
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