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The perimeter of the rectangle whose len...

The perimeter of the rectangle whose length is 60 cm and a diagonal is 61 cm is

A

120cm

B

122cm

C

71cm

D

142cm

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NCERT EXEMPLAR-TRIANGLES-EXERCISE CHOOSE THE CORRECT ONE
  1. If in an isosceles triangle, each of the base angles is 40°, then the...

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  2. If two angles of a triangle are 60° each, then the triangle is

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  3. The perimeter of the rectangle whose length is 60 cm and a diagonal is...

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  4. In ∆PQR, if PQ = QR and ∠Q = 100°, then ∠R is equal to

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  5. Which of the following statements is not correct?

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  6. In Figure, BC = CA and ∠A = 40. Then, ∠ACD is equal to

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  7. The length of two sides of a triangle are 7 cm and 9 cm. The length of...

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  8. From Fig. 6.10, the value of x is

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  9. In Fig. 6.11, the value of ∠A + ∠B + ∠C + ∠D + ∠E + ∠F is

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  10. In Fig. 6.12, PQ = PR, RS = RQ and ST || QR. If the exterior angle RPU...

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  11. In Fig. 6.13, ∠BAC = 90°, AD ⊥ BC and ∠BAD = 50°, then ∠ACD is

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  12. If one angle of a triangle is equal to the sum of the other two angles...

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  13. If the exterior angle of a triangle is 130° and its interior opposite...

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  14. If one of the angles of a triangle is 110°, then the angle between the...

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  15. In ∆ABC, AD is the bisector of ∠A meeting BC at D, CF ⊥ AB and E is th...

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  16. In ∆PQR, if ∠ P = 60°, and ∠ Q = 40°, then the exterior angle formed b...

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  17. Which of the following triplets cannot be the angles of a triangle?

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  18. Which of the following can be the length of the third side of a triang...

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  19. How many altitudes does a triangle have?

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  20. If we join a vertex to a point on opposite side which divides that sid...

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