Mathszilla

perimeter of circle perimeter of circle or circumference of the circle is defined as measurement of boundary length of the circle. formula of circumference of the circle for radius R is 2piR,where R is radius of the circle and  value of π is 3.14 or 22/7. The circumference of the circle for diameter D is πD. Question for practice Q1. Find circumference of the circle whose radius is 4cm. solution: Radius R=4cm               circumference =2πR                                     =2*3.14*4 = 25.12cm Q2. Find circumference of circle where diameter is 16cm. solution: Diameter D=16cm               Radius R=16/2=8cm             circumference=2πR                                   =2*3.14*8=50.24 cm Alternate Method : D=...

 PERIMETER OF SQUARE  The perimeter of square is calculated by adding its four sides. We know that all the sides of a square are equal and hence, its perimeter will be 4 times its side, i.e. 4 × Side. The formula for Perimeter of a Square Perimeter of Square (P) = 4 × Side Where side is length of  the side of square.  Example: 1. Find the perimeter of a square whose side      is 4cm. Sol:  side =4cm        Perimeter of square= 4×4= 16cm 2.Find the perimeter of a square whose side     is 5 cm. Sol:   side= 5cm          Perimeter of square= 4×5 =20cm 3. Calculate the perimeter of a square               having a side of 15 cm. Sol: side =15cm        Perimeter of square= 4×15= 60cm 4.   If the perimeter of a square is 64 cm,             find its side. Sol: perimeter of square=64cm ...