It is: 0.5*18*20 = 180 square m
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The formula for the area of a triangle is, A = 1/2b x h, where b is base and h is height. A = 1/2(18m) x 20m = 180m2 Another way to write the formula for the area of a triangle is A = (b x h)/2, which gives the same answer. A = (18m x 20m)/2 = 180m2
If C=18m then A = 25.783m2
216 square meters.
18m m-2m = 16
Just add the 3 sides: 5+6+7 = 18m