write formulas from chapter 11- 12 with appropriate diagram class 7
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Perimeter of a square = 4a
Area of square = 4a2
Area of square = (side)2
Perimeter of a rectangle = 2(l + b)
Area of rectangle = l × b
Area of parallelogram = Base × Height
Area of triangle = \frac{1}{2} \times Base \times Height
2
1
×Base×Height
Circumference of a circle = 2πr
Area of a circle = πr2
Diameter (d) = 2r
Step-by-step explanation:
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