Answer:
25cm2
Explanation:
Perimeter of triangle = a + a + a = 30cm
So, a = 10cm
Perimeter of rectangle = 2(a + b) = 30cm
A + b = 30/2 = 15cm
So, b = 15 - 10 = 5cm
Area of square = b × b
Area = 5 × 5 = 25cm2
area is 25 squared
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