36cm
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12cm
Perimeter = 6cm + 6cm + 9cm + 9cm = 30cm
The area of rectangle is : 72.0
A right angle triangle fits the dimensions given
Well, honey, to find the perimeter of a rectangle, you add up all the sides. So for a rectangle with sides of 6cm and 3cm, you add 6 + 6 + 3 + 3, which gives you a perimeter of 18cm. Math doesn't have to be complicated, darling.