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Find BC, if the area of the triangle ABC...

Find `BC,` if the area of the triangle `ABC` is `36cm^2` and the height `AD` is `3cm` (Fing 11.21)

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`1/2 ×BC×AD =Area`
⇒`36= 1/2 ×BC× 3`
`BC=24`.
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NCERT-PERIMETER AND AREA-SOLVED EXAMPLES
  1. What is the circumference of a circle of diameter 10 cm. (Take pi=3.14...

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  2. What is the circumference of a circular disc of radius 14 cm? (Take pi...

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  3. Find BC, if the area of the triangle ABC is 36cm^2 and the height AD ...

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  4. In Delta PQR, PR = 8cm, QR = 4 cm and PL = 5 cm (Fig 11.22). Find: (i...

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  5. Sudhanshu divides a circular disc of radius 7cm in two equal parts. Wh...

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  6. Find the area of a circle of radius 30 cm (use pi=3.14)

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  7. The radius of a circular pipe is 10 cm. What length of a tape is requi...

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  8. Find the perimeter of the given shape (Fig 11.32) (Take pi=22//7)

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  9. Diameter of a circular garden is 9.8 m. Find its area.

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  10. The adjoining figure shows two circles with the same centre. The radi...

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  11. Two cross roads, each of width 5 m, run at right angles through the ce...

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  12. A path 5 m wide runs along inside a square park of side 100 m. Find th...

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  13. A rectangular park is 45 m long and 30 m wide. A path 2.5 m wide is c...

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  14. A door-frame of dimensions 3m×2m is fixed on the wall of dimension 10m...

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  15. Anu wants to fence the garden in front of her house (Fig 11.5), on th...

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  16. The area of a rectangular sheet is 500m^2. If the length of the sheet ...

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  17. The area of a square and a rectangle are equal. If the side of the sq...

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  18. A wire is in the shape of a square of side 10 cm. If the wire isreben...

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  19. Find the height ‘x’ if the area of the parallelogram is 24 cm^2 and t...

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  20. One of the sides and the corresponding height of a parallelogram are ...

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