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. 32 cm 26 cm 40 cm 16 cm 20 cm 2. Calculate the area of a circle whose diameter is 7 cm. 22 cm² 44 cm² 154 cm² 38.5 cm² 38 cm² 3. An equilateral triangle of sides 16 cm has the same perimeter of a square. The area of the square in cm² is? 256 96 144 64 4. Find the area of a square with side 7 cm. 14 cm² 10 cm² 49 cm² 343 cm² 35 cm² 5. Find the perimeter of a rectangle of sides (a + 2) and (a - 2). 4a - 8 2a - 4 2a 4a a + 4 6. In the isosceles trapezoid ABCD we know: AB||CD, |CD| = c = 8 cm, height h = 7 cm, |∠CAB| = 35°. Find the area of the trapezoid. 69.98 cm² 12.73 cm² 47.54 cm² 31.53 cm² 7. The perimeter of a rectangle is 20 cm. If the breadth is 4 cm, find its area. 16 cm² 40 cm² 20 cm² 18 cm² 24 cm² 8. 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 9. A square has a perimeter of 24 cm. Find its area in cm². 24 cm² 36 cm² 48 cm² 72 cm² 96 cm² 10. The length of a board is twice its width. If its perimeter is 3.60 m, what is its width in cm? 100 cm 120 cm 240 cm 60 cm 150 cm 11. Find the area of a parallelogram whose base and height are 46 cm and 12 cm respectively. 58 cm² 116 cm² 276 cm² 552 cm² 12. The area of a triangle ABC is 18 cm² and the base is 6 cm. Calculate the height of the triangle. 9 cm 18 cm 2 cm 6 cm 4 cm 13. Two concentric circles have radii 2 cm and 3 cm respectively, calculate the ratio of their areas. 7 : 198 7 : 88 8 : 18 4 : 9 9 : 88 14. Three points, R, S, and T marked the edges of a garden plot. If |RS| = 5 m, |ST| = 13 m, and |RT| = 12 m, find the area of the garden plot. 15 m² 27 m² 30 m² 28 m² 8 m² 15. If the area of a rectangle is 144 cm² and its breadth is 6 cm, find the perimeter if the rectangle. 12 cm 144 cm 24 cm 30 cm 60 cm 16. A right-angled isosceles triangle has the area of 32 cm^{2}. What is its perimeter ? 22.1 cm 27.31 cm 35 cm 12 cm 17. A square field has a perimeter of 48 m. Find the area of the field. 144 m² 24 m² 48 m² 12 m² 96 m² 18. A square on the picture has 8 cm long side. Find the area of the colored part of a circle 28.88 cm² 36.53 cm² 361 cm² 6.54 cm² 19. The perimeter of a football field is 102 cm. Find the length of the field if its breadth is 24 cm. 48 cm 63 cm 27 cm 51 cm 12 cm 20. Calculate the perimeter of a football field which measures 60 m by 40 m. 100 m 2400 m 200 m 20 m 120 m 1 out of 20 Time is Up! Time's up