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The following figure shows a square ABCD...

The following figure shows a square ABCD and an equilateral triangle DCE. Prove that :
(i) `angleADE=angleBCE=150^(@)`
(ii) `DeltaADE cong DeltaBCE`
(iii) `AE = BE`

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NAGEEN PRAKASHAN-TRIANGLES-Exercise 7a
  1. The adjoining figure shows a square ABCD and an equilateral triangle D...

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  2. Equilateral triangles ABD and ACE are drawn on sides AB and AC respect...

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  3. The following figure shows a square ABCD and an equilateral triangle D...

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  4. The given figure showns a parallelogram ABCD. Squares ABPQ and ADRS ar...

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  5. In a DeltaABC, BD is the median to the side Ac, BD is produced to E su...

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  6. In the given figure, angleBDC=angleBEA and AB = BC. Show that AE=CD.

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  7. If the diagonals of a quadrilateral bisect each other at right angle, ...

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  8. In the adjoining figure, BM and DN are the perpendiculars from B and D...

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  9. In the adjoining figure, AB=EF, BC=DE, angleABC=angleFED=90^(@), prove...

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  10. In the adjoining figure, ABCD is a parallelogram. If angleMBC = angleN...

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  11. In the adjoining figure, QX and RX are the bisectors of the angles Q a...

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  12. In the following figure, OA = OC and AB = BC. Prove that : (i) angle...

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  13. In the adjoining figure, ABCD is a paralogram. The side AB is produced...

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  14. In the following figures, AB=PQ, AC=PR and AM=PN. Prove that DeltaABC ...

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  15. Prove that the medians of an equilateral triangle are equal.

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  16. ABCD is a square EF is parallel to BD. R is the mid-point of EF. Prove...

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  17. The following figure shows a triangle ABC in which Ab = AC. M is a poi...

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  18. In the given figure, AB"||"DC and angleD=angleC. Prove that : (i) AD...

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  19. In the following figure, AB||FD, AC||GE and BD = CE. Prove that : (i...

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  20. In the adjoining figure, angleAYZ=angleBYX=90^(@), AY = YZ and XY = BY...

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