19/03/2020 Area and Perimeter of Plane Shapes(Study by Topics Junior Class) 0Comments by Gate Academy Welcome to your Area and Perimeter of Plane Shapes(Study by Topics Junior Class) NAME EMAIL PHONE NUMBER 1. The perimeter of a rectangle is 20 cm. If the breadth is 4 cm, find its area.16 cm²20 cm²24 cm²40 cm²18 cm²2. On the picture two and another two semicircles are identical. The radius of one semicircle is twice as large as the radius of the other semicircle. Find the area of the colored pattern if |AB| = 12 cm. 37.7 cm²57.7 cm²45 cm²25 cm²3. The area of a rectangle is 40 cm² and one side is 8 cm long. Find its perimeter.40 cm16 cm26 cm32 cm20 cm4. A square field has a perimeter of 48 m. Find the area of the field.48 m²144 m²96 m²12 m²24 m²5. Find the length of the diagonal of a rectangle whose length and breadth are 8 cm and 6 cm respectively.12 cm15 cm10 cm11 cm7 cm6. Two concentric circles have radii 2 cm and 3 cm respectively, calculate the ratio of their areas.4 : 97 : 1989 : 887 : 888 : 187. What is the area of a trapezoid that has a base of 2 inches, a base of 4 inches and a height of 3 inches? 9 sq inches6 sq. inches24 sq. inches15 sq. inches8. The perimeter of a football field is 102 cm. Find the length of the field if its breadth is 24 cm.48 cm51 cm63 cm12 cm27 cm9. A right-angled triangle ABC has the legs a = 5 cm, b = 8 cm. A triangle A'B'C' is similar to the triangle ABC and it is 2.5 times smaller. Calculate what percentage of the area of the triangle ABC takes the area of the triangle A'B'C'.75%23%16%7%10. Calculate the area of the triangle drawn below.25 cm²20 cm²14 cm²54 cm²40 cm²11. Find the radius of a circle having 154 cm² as its area. (π = 22/7)3.5 cm24.5 cm49 cm14 cm7 cm12. A trapezoid ABCD has the bases length of a = 120 mm, c = 86 mm and the area A = 2,575 mm2. Find the height of the trapezoid.7.5 mm25 mm15.7 mm31 mm13. Find the radius of a circle having 154 cm² as its area.14 cm49 cm7 cm3.5 cm24.5 cm14. Find the area of the rectangle ABCD, where the length of the side |AB| = a = 8.2 cm and the diagonal d = 2a.116.46 cm²29.2 cm²98.5 cm²32.5 cm²15. Calculate to the nearest whole number the perimeter of a circle whose radius is 6cm.37 cm39 cm36 cm38 cm16. Find the perimeter of a rectangle of sides (a + 2) and (a - 2).2a4a - 8a + 42a - 44a17. One of the internal angles of the rhombus is 120° and the shorter diagonal is 3.4 meters long. Find the perimeter of the rhombus.21.7 m28 m16 m13.6 m18. Calculate the perimeter of a football field which measures 60 m by 40 m.100 m20 m200 m2400 m120 m19. The length of a diagonal of a 3 cm wide rectangle is 5 cm. Find the area of the rectangle.20 cm²10 cm²15 cm²12 cm²20. Find the area of a parallelogram whose base and height are 46 cm and 12 cm respectively.552 cm²58 cm²116 cm²276 cm²21 out of 20Time is Up!