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In an isosceles triangle, prove that the...

In an isosceles triangle, prove that the angles opposite to equal sides are equal.

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The correct Answer is:
`angleB=angleC`
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An isosceles triangle has base 20cm and each of the two equal sides measures 18 cm. What is its perimeter?

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If a line is drawn parallel to the base of an isosceles triangle to intersect its equal sides, prove that the quadrilateral, so formed is cyclic.

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ICSE-CONGRUENCE-EXERCISE 21
  1. In an isosceles triangle, prove that the angles opposite to equal side...

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  2. State the condition (SSS or SAS or ASA or RHS) under which DeltaABC~=D...

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  3. State the condition (SSS or SAS or ASA or RHS) under which DeltaABC~=D...

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  4. State the condition (SSS or SAS or ASA or RHS) under which DeltaABC~=D...

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  5. State the condition (SSS or SAS or ASA or RHS) under which DeltaABC~=D...

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  6. State giving reasons, which of the following are pairs of congruent tr...

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  7. State giving reasons, which of the following are pairs of congruent tr...

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  8. State giving reasons, which of the following are pairs of congruent tr...

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  9. State giving reasons, which of the following are pairs of congruent tr...

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  10. State giving reasons, which of the following are pairs of congruent tr...

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  11. State giving reasons, whether the following pairs of triangles are con...

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  12. State giving reasons, whether the following pairs of triangles are con...

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  13. State giving reasons, whether the following pairs of triangles are con...

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  14. State giving reasons, whether the following pairs of triangles are con...

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  15. In the given figure, AB=CD and AD=CB. Prove that : (i) DeltaABD=Delt...

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  16. In the given figure, angleSPR=angleQRP and angleRSP=anglePQR. Prove th...

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  17. In the given figure we have AO=BO and CO=DO. Prove that : (i) DeltaA...

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  18. In the given figure, ABbotBD,CDbotBD and AB=CD. Prove that : (i) Del...

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  19. In the given figure, PLbotOA and PMbotOB such that OL=OM. Prove that :...

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  20. In the given figure, we have PQ=SR and PR=SQ. Prove that : (i) Delta...

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  21. In the given figure, we have ACbotCD,BCbotCD and DA=DB. Prove that : C...

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