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In figure, if DEabs()BC, then find the r...

In figure, if DE`abs()`BC, then find the ratio of ar (`DeltaADE`) and ar(DECB).

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`ar(triangleDEC)=ar(triangleDEB)` (`triangle` on the same base and between base and between the same parallels).
(i) Add `ar(triangleADE)` on both sides.
(ii) Substract `ar(triangleODE)` from both sides.
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RS AGGARWAL-AREAS OF PARALLELOGRAMS AND TRIANGLES -Exercise 11
  1. In the adjoining figure, MNPQ and ABPQ are parallelogram and T is any ...

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  2. Assertion (A) : In a trapezium ABCD, we have AB ||DC and the diagonals...

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  3. In figure, if DEabs()BC, then find the ratio of ar (DeltaADE) and ar(D...

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  4. Show that a median of a triangle divides it into two triangles of e...

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  5. A diagonal of a parallelogram divides it into two triangles of equal a...

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  6. In Fig. 9.24, ABC and ABD are two triangles on the same base AB. If l...

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  7. The points D and E are respectively located on AB and AC on the sides ...

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  8. O is the any point on diagonal PR of parallelogram PQRS. Prove that Ar...

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  9. In the adjoining figure, the diagonals AC and BD of a quadrilateral AB...

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  10. The vertex A of triangle ABC is joined to a point D on the side BC. Th...

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  11. D is the midpoint of side BC of triangleABC and E is the midpoint of ...

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  12. In trapezium ABCD, AB || DC and L is the mid-point of BC. Through L, a...

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  13. In the adjoining figure, ABCD is a quadrilateral. A line through D, p...

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  14. In the adjoining figure, triangle ABC and triangleDBC are on the same ...

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  15. ABCD is a parallelogram in which BC is produced to E such that CE = BC...

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  16. A point E is taken on the side BC of a parallelogram ABCD. AE and DC a...

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  17. P, Q, R, S are respectively the midpoints of the sides AB, BC, CD and ...

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  18. किसी त्रिभुज ABC की मधिकाएँ CD और BE एक दूसरे को O पर कटती है , तो अन...

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  19. The base BC of Delta ABC is divided at D, so that BD=1/2DC. Prove that...

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  20. In the adjoining figure, BD||CA, E is the midpoint of CA and BD =(1)/(...

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