Rectangle Area, A = base X height , Rectangle Perimeter , P = base + height + base + height, Triangle Area, A = 0.5 X base X height , Circle Area, A = 3.14 X radius X radius, Circle Circumference , C = 3.14 X (radius + radius) , Parallelogram Area, A= base X height , Trapezium Area, A= (side + side) ÷2 X height .

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