19/03/2020Area 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. Calculate the perimeter of a semi-circle whose diameter is 14 cm.58 cm11 cm36 cm22 cm14 cm2. If the area of a circle is 154 cm², what is the diameter of the circle?21 cm28 cm14 cm7 cm30 cm3. The area of a rectangle is 40 cm² and one side is 8 cm long. Find its perimeter.20 cm16 cm32 cm40 cm26 cm4. The area of a triangle ABC is 18 cm² and the base is 6 cm. Calculate the height of the triangle.18 cm2 cm4 cm9 cm6 cm5. Find the area of the rectangle ABCD, where the length of the side |AB| = a = 8.2 cm and the diagonal d = 2a.98.5 cm²29.2 cm²32.5 cm²116.46 cm²6. A square field has a perimeter of 48 m. Find the area of the field.48 m²144 m²12 m²24 m²96 m²7. 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.25 mm7.5 mm15.7 mm31 mm8. The area of a rectangle is 40 cm² and one side is 8 cm long. Find its perimeter.32 cm26 cm40 cm16 cm20 cm9. Two concentric circles have radii 2 cm and 3 cm respectively, calculate the ratio of their areas.8 : 184 : 97 : 887 : 1989 : 8810. Find the area of a parallelogram whose base and height are 46 cm and 12 cm respectively.58 cm²116 cm²276 cm²552 cm²11. Consider the isosceles trapezoid PQRS. The bases are |PQ| = 120 mm, |RS| = 62 mm and the arm s = 48 mm. Find the height of the trapezoid, diagonal length and the area of the trapezoidh = 77.25 mm, d = 91.15 mm, A = 380.53 mm²h = 58.22 mm, d = 8.71 mm, A = 3,480.68 mm²h = 38.25 mm, d = 98.71 mm, A = 5,480.68 mm²h = 38.25 mm, d = 98.71 mm, A = 3,480.68 mm²12. The diameter of a record player disc is 14 cm. Calculate its area.616 cm²154 cm²11 cm²44 cm²144 cm²13. Calculate the perimeter of a football field which measures 60 m by 40 m.2400 m120 m200 m20 m100 m14. A rectangular garden has a length of 57 m and a width of 42 m. Calculate of how many m2 will decrease the area of a garden, if the ornamental fence with a width of 60 cm will be planted inside its perimeter.445 m²74 m²121 m²117.36 m²15. The length of a board is twice its width. If its perimeter is 3.60 m, what is its width in cm?150 cm240 cm120 cm60 cm100 cm16. 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'.23%7%16%75%17. A perimeter of an isosceles triangle is 474 m. The base of the triangle is by 48 m longer than the arm. Find the length of the sides and the area of the triangle.a = b = 142 m, c = 142 m, A = 2,026.44 ma = b = 142 m, c = 12.4 m, A = 16,026.44 ma = b = 112 m, c = 14 m, A = 15,026.44 ma = b = 142 m, c = 190 m, A = 10,026.44 m18. 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.28 m13.6 m16 m21.7 m19. The perimeter of a football field is 102 cm. Find the length of the field if its breadth is 24 cm.12 cm48 cm51 cm27 cm63 cm20. A square has a perimeter of 24 cm. Find its area in cm².72 cm²36 cm²24 cm²48 cm²96 cm²21 out of 20Time is Up!