The longest side of a triangle is 90cm and one of its remaining 2 sides is 54cm . Find its area .

Is it a right angled Triangle?
If so...
Applying Pythagoras Theorem ....
 902 = 542 + x2
8100 - 2916 = x2
5184 = x2
x = 72
Area of a triangle = 1/2 * base * height
Hypotenuse = 90 which is not required. Thus the remaining data will be used.
1/2 * 54 * 72 = 1944cm2
Area = 1944cm2

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