A ladder 10 cm long reaches a window 8 m above the ground. The d

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 Multiple Choice QuestionsLong Answer Type

461. In the given Fig,  two triangles ABC and DBC lie on the same side of base BC. P is a point on BC such that PQ || BA and PR || BD. Prove that: QR || AD.


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 Multiple Choice QuestionsShort Answer Type

462. In a ∆ABC, DE || BC. If DE space equals space 2 over 3 BC and area of ∆ABC = 81 cm2, find the area of ∆ADE.
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463.

In the given Fig. ABC is a triangle right angled at B. P and Q trisect BC. Prove that: 8AP2 = 3AC2 + 5AQ2.

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 Multiple Choice QuestionsMultiple Choice Questions

464.

In the given Fig, if DE || BC then the value of EC is

  • 2.5 cm

  • 1.4 cm

  • 2 cm 

  • 2 cm 

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465.

In the given Fig, space increment ABC space and space increment DEF  are similar, BC = 3 cm, EF = 4 cm and area of ∆ABC = 54 cm2. The area of ∆DEF is

  • 72 sq. cm 
  • 96 sq. cm
  • 36 sq. cm  
  • 36 sq. cm  
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466.  In the given Fig, DE || BC and AD : DB = 5 : 4 then the value of space fraction numerator ar left parenthesis increment DEF right parenthesis over denominator ar left parenthesis increment CFB right parenthesis end fraction is

  • 25 over 81
  • 25 over 16
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467. ABC and BDE are two equilateral triangles such that D is the midpoint of BC. Ratio of the areas of triangles ABC and BDE is
  • 2 : 1 
  • 1 : 2
  • 4 : 1
  • 4 : 1
139 Views

468. Sides of two similar triangles are in the ratio 3 : 2. Areas of these triangles are in the ratio
  • 3 : 4
  • 9 : 2
  • 9 : 5
  • 9 : 5
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469. A ladder 10 cm long reaches a window 8 m above the ground. The distance of the foot of the ladder from base of the wall is
  • 5 cm 
  • 6 cm
  • 7 cm 
  • 7 cm 


B.

6 cm
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470. What value(s) of x will make DE || AB in the fig. 

  • -2

  • 3

  • 4

  • 4

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