Welcome to your Area and Perimeter of Plane Shapes(Study by Topics Junior Class) NAME EMAIL PHONE NUMBER 1. 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 cm²31.53 cm²12.73 cm²47.54 cm²2. The area of a rectangle is 40 cm² and one side is 8 cm long. Find its perimeter.32 cm40 cm16 cm26 cm20 cm3. Find the radius of a circle having 154 cm² as its area.24.5 cm14 cm7 cm3.5 cm49 cm4. 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%7%23%16%5. Find the length of the diagonal of a rectangle whose length and breadth are 8 cm and 6 cm respectively.10 cm11 cm7 cm15 cm12 cm6. Calculate the area of a circular field of diameter 6 m, correct to 2 s.f. (Take π = 3.14)28.3 m²112 m²9.4 m²29 m²28 m²7. A trapezoid ABCD has the bases length of a = 120 mm, c = 86 mm and the area A = 2,575 mm^{2}. Find the height of the trapezoid.31 mm25 mm7.5 mm15.7 mm8. Find the area of a parallelogram whose base and height are 46 cm and 12 cm respectively.116 cm²552 cm²276 cm²58 cm²9. 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 = 12.2 m², P = 91.5 mA = 529.2 m², P = 191.5 mA = 342 m², P = 19 mA = 29.4 m², P = 194 m10. Find the perimeter of a circle if its area is 706.5 cm^{2}.45.7 cm121 cm94.2 cm53 cm11. The area of a rectangle is 40 cm² and one side is 8 cm long. Find its perimeter.32 cm16 cm26 cm40 cm20 cm12. If the area of a circle is 154 cm², what is the diameter of the circle?7 cm30 cm28 cm21 cm14 cm13. The perimeter of a rectangle is 20 cm. If the breadth is 4 cm, find its area.20 cm²16 cm²40 cm²18 cm²24 cm²14. The length of a diagonal of a 3 cm wide rectangle is 5 cm. Find the area of the rectangle.20 cm²15 cm²10 cm²12 cm²15. Calculate to the nearest whole number the perimeter of a circle whose radius is 6cm.39 cm38 cm36 cm37 cm16. A square field has a perimeter of 48 m. Find the area of the field.48 m²12 m²24 m²144 m²96 m²17. The perimeter of a football field is 102 cm. Find the length of the field if its breadth is 24 cm.63 cm48 cm27 cm51 cm12 cm18. The area of a triangle ABC is 18 cm² and the base is 6 cm. Calculate the height of the triangle.9 cm2 cm18 cm4 cm6 cm19. Find the radius of a circle having 154 cm² as its area. (π = ^{22}/_{7})7 cm3.5 cm14 cm49 cm24.5 cm20. A square on the picture has 8 cm long side. Find the area of the colored part of a circle 6.54 cm²361 cm²28.88 cm²36.53 cm²21 out of 20Time is Up!