## Ismaiel Kalady is teaching live on Unacademy Plus

MENSURATION OF 2D SHAPES 4 20 QUESTIONS AREA & PERIMETER TRICKS unacademy Follow my Profile for more classes, SMAIEL KALADY

Course Overvievw Basics of 2D Shapes V Area & Perimeter of all 2D Shapes How to remember Equations? V All Types of Problems Previous Year PSC Questions smaiel Kalady

Circle Equations Figure Ismaiel Kalady

Circle Equations Figure If 'r' is the radius then area, A -r Circumference, C 2Ttr Ismaiel Kalady

10. If the area of a circle is equal to its circumference, then diameter of the circle is: a) 2cm Ans: b) 4cm c) 1 cm d) 3.14 cm Ismaiel Kalady

10. If the area of a circle is equal to its circumference, then diameter of the circle is: a) 2cm Ans: b) 4cm c) 1 cm d) 3.14 cm Area - circumference nr22Tr Ismaiel Kalady

10. If the area of a circle is equal to its circumference, then diameter of the circle is: a) 2cm Ans: b) 4cm c) 1 cm d) 3.14 cm Area = circumference r2 2 r r-2 Diameter-2 2 = 4cm smaiel Kalady

11. If the circumference of a circle is 44cm, then find its area? Ans: Ismaiel Kalady

11. If the circumference of a circle is 44cm, then find its area? Ans: 2 7s 44 22 r-22 7 Ismaiel Kalady

11. If the circumference of a circle is 44cm, then find its area? Ans: 2 7-44 22 r- 22 7 Area-Tr2-22 7 7 = 154 cm? 7 Ismaiel Kalady

12. If the radius of a circle is increased by 50%, then its area is increased by Ans: Let radius be 2 , then A = = 2 2 = 4 If radius increased by 50%, new radius = 2+1 = 3 smaiel Kalady

12. If the radius of a circle is increased by 50%, then its area is increased by Ans: Let radius be 2 , then A - 2 2-4 If radius increased by 50%, new radius = 2+1 = 3 % increase in area-9-4 100 = 5x100 = 125% 4 smaiel Kalady