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in Perimeter and Area of Plane Figures by (29.9k points)
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Find the area of a triangle whose sides are 42 cm, 34 cm and 20 cm.

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Best answer

To find the area of the triangle, we will first find the semiperimeter of the triangle 

Thus, we have:

\(s=\frac{1}{2}(a+b+c)=\frac{1}{2}(42+34+20)\)

\(\frac{1}{2}\times 96=48\) cm

Now, 

= 336 cm2

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