Welcome to your Area and Perimeter of Plane Shapes(Study by Topics Junior Class) NAME EMAIL PHONE NUMBER 1. The area of a rectangle is 40 cm² and one side is 8 cm long. Find its perimeter. 20 cm 40 cm 16 cm 32 cm 26 cm 2. A land of a right-angled trapezoid shape has the bases lengths of 92 m and 76 m and the vertical arm is 6.3 m long. Find the land area and the length of a fencing needed to fence the land. A = 529.2 m², P = 191.5 m A = 342 m², P = 19 m A = 29.4 m², P = 194 m A = 12.2 m², P = 91.5 m 3. A classroom of length (2b + 1) has breadth 'b'. What is the perimeter of the classroom? 2b + 1 6b + 2 3b + 1 b + 1 4. 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'. 16% 75% 23% 7% 5. If the area of a rectangle is 144 cm² and its breadth is 6 cm, find the perimeter if the rectangle. 144 cm 30 cm 60 cm 12 cm 24 cm 6. Find the radius of a circle having 154 cm² as its area. (π = ^{22}/_{7}) 14 cm 7 cm 3.5 cm 49 cm 24.5 cm 7. The area of a rectangle is 40 cm² and one side is 8 cm long. Find its perimeter. 32 cm 40 cm 20 cm 26 cm 16 cm 8. 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. 16 m 13.6 m 21.7 m 28 m 9. A rectangular garden has a length of 57 m and a width of 42 m. Calculate of how many m^{2} will decrease the area of a garden, if the ornamental fence with a width of 60 cm will be planted inside its perimeter. 445 m² 121 m² 74 m² 117.36 m² 10. How many tiles of dimension 0.3 m by 0.3 m will cover a floor area of 32.49 square meters? 400 tiles 361 tiles 366 tiles 355 tiles 350 tiles 11. A square field has a perimeter of 48 m. Find the area of the field. 24 m² 48 m² 144 m² 96 m² 12 m² 12. Calculate the area of the triangle drawn below. 40 cm² 54 cm² 14 cm² 25 cm² 20 cm² 13. The perimeter of a rectangle is 20 cm. If the breadth is 4 cm, find its area. 24 cm² 40 cm² 18 cm² 20 cm² 16 cm² 14. The area of a trapezium ABCD is 156 cm². If the parallel sides are 17 cm and 35 cm respectively, what is the height of the trapezium? 6 cm 9 cm 5 cm 4 cm 15. The length of a board is twice its width. If its perimeter is 3.60 m, what is its width in cm? 120 cm 60 cm 240 cm 150 cm 100 cm 16. The area of a triangle ABC is 18 cm² and the base is 6 cm. Calculate the height of the triangle. 2 cm 18 cm 4 cm 9 cm 6 cm 17. Find the perimeter of a rectangle of sides (a + 2) and (a - 2). 4a - 8 a + 4 2a 4a 2a - 4 18. 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 inches 6 sq. inches 24 sq. inches 15 sq. inches 19. Two concentric circles have radii 2 cm and 3 cm respectively, calculate the ratio of their areas. 8 : 18 7 : 198 7 : 88 9 : 88 4 : 9 20. A square on the picture has 8 cm long side. Find the area of the colored part of a circle 6.54 cm² 28.88 cm² 36.53 cm² 361 cm² 1 out of 20 Time is Up! Time's up