| http://www.w3.org/ns/prov#value | - Then, Perimeter of the triangle = a + b + c ??? 180 cm = 80 cm + 18 cm + c ??? c = 180 cm ??? 98 cm = 82 cm Now, a2 + b2 = (80)2 + (18)2 = 6400 + 324 = 6724 = (82)2 Therefore, a2 + b2 = c2 Hence, the given triangle is a right angled triangle ??? Area of ??ABC = 12 ?? base ?? corresponding altitude = 12 ?? 80 ?? 18 cm2 = 720 cm2 Also, AC is the shortest side, therefore its corresponding altitude is
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