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DeltaABC~DeltaDEF, and their areas are 6...

`DeltaABC~DeltaDEF`, and their areas are `64cm^2` and `121cm^2` respectively. If EF=15.4 cm then BC is

A

11.0 cm

B

11.2 cm

C

11.4 cm

D

11.6 cm

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R G PUBLICATION-MODEL PAPER 1-EXERCISE
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  2. If the angle between radii of a circle is 100^@, the angle between the...

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  3. DeltaABC~DeltaDEF, and their areas are 64cm^2 and 121cm^2 respectively...

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  4. If cos(40^@+A)=sin 30^@, then the value of A is

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  5. The value of sin^2 30^@-cos^2 30^@ is:

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  6. The median of a given frequency distribution is found with the help of...

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  7. Is 7^5xx3^2xx5+3 a composite number? Justify the answer.

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  8. Find the zeroes of the polynomial 4sqrt3x^2-5x-2sqrt3.

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  9. If the zeroes of the polynomial x^2-5x+k are the reciprocal of each ot...

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  10. Three angles of a triangle are x,y and 40^@. The difference between th...

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  11. Prove that cosA/(1+sinA)+(1+sinA)/cosA=2secA.

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  12. If A,B,C are the interior angles of ABC, then prove that cos((A+B)/2)=...

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  13. Prove that sqrt5 is irrational.

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  14. If alpha and beta are the two zeroes of the quadratic polynomial x^2-3...

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  15. Prove that (1-sintheta)/(1+sintheta)=(sectheta-tantheta)^2.

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  16. Prove that in a right traiangle, the square of the hypotemuse is equal...

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  18. In the figure ,DeltaABC is right angles at B, BC=7cm and AC-AB=1cm. Fi...

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  19. In figure D,E,F are midpoints of sides BC,CA,AB respectively of DeltaA...

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  20. Find the coordinates of a point A,where AB is the diameter of a circle...

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