That's the one on the right.

That's the one on the left.

The triangle on the right has sides whose lengths 
are some constant k times the lengths of the sides
of the triangle on the left. 

The formula for the area of a triangle is



For the larger triangle on the right, the area
is given as 96 cm², the base is 3k and the height
is 4k, so we substitute:













The perimeter is the sum of the three sides.









Edwin

 

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