11. The area of a square whose perimeter is 4 m
12. The area of parallelogram is
13. The area of parallelogram whose base 6 cm & altitude 7 cm is
14. The area of rectangle whose length is 15 cm & breadth is 6 m
15. The area of triangle is
16. The base in the area of parallelogram is
17. The base in the area of triangle is
18. The circumference of a circle is
19. The circumference of a circle with radius 7 cm is
20. The circumference of circle whose diameter is 14 cm will be
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