find the area of triangle two sides which are 16cm and 12 cm and the perimeter is 42cm.
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Answer:
Step-by-step explanation:
Fiirst side of triangle = a = 16cm.
Second side of triangle = b = 12cm
Perimeter = 42 cm.
∴A + B = 16 + 12= 28cm.
Hence, C= 42cm- 28cm=14cm.
s= A+B+C/2 = 16+12+14/2 = 42/2 = 21
Herons formula,
Area of Triangle = A= √s(s-a)(s-b)(s-c)
√21(21-16)(21-12)(21-14)
√21(5)(9)(7)
√6615
81.33265027
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