class:7 work sheet-3 subject: mathematics perimeter and area INSTRUCTION: HOME WORK FOR APRIL SECOND AND THIRD WEEK KEY WORDS 1)Circumference of a Circle 2)Area of Circle Based on above video do the following sums circumference of a circle=2𝜋r where 𝜋=22÷7 and r is radius of circle (d=2r) 1) Find the circumference of the circles with the following radius: (Take π = 22 ÷7 ) (a) 14 cm (b) 28 mm (c) 21 cm 1)Perimeter of a semi circle=(36xr)➗7 or πr+2r 2) The diameter of the given semi-circular slice of watermelon is 14 cm. What will be the perimeter of the slice of watermelon? Area of Circle 1) Area of the circle = πr2 2)Area of semi circle=πr Based on above video do the following sum 3. Find the area of the following circles, given that: (a) radius = 14 mm (Take π = 22/ 7 ) (b) diameter = 49 m (c) radius = 5 cm 4) Find the area and perimeter of