D and E are points on side AB and AC of Δ ABC. DE is p

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 Multiple Choice QuestionsMultiple Choice Questions

121.

ABC is a right-angled triangle. B being the right angle. Mid-points of BC and AC are respectively B' and A'. The ratio of the area of the quadrilateral AA'B'B to the are of Δ ABC is 

  • 1 : 2

  • 2 : 3

  • 3 : 4

  • None of these

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122.

In the ΔABC,  and the bisectors of  and  meets at P What is the value (in degrees) of 

  • 100°

  • 105°

  • 115°

  • 125°


123.

The two equal sides of an isosceles triangle is 20 cm each and the third side is 30 cm. What is the area (in cm2) of the triangle?

  • 50 square root of 5 space cm squared

  • 100 cm2

  • 75 square root of 7 space cm squared

  • 175 cm2


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124.

D and E are points on side AB and AC of Δ ABC. DE is parallel to BC. If AD : BD = 2 : 5 and area of Δ ABC is 98 cm2, what is the area (in cm2) of quadrilateral BDEC?

  • 90 cm2

  • 98 cm2

  • 94 cm2

  • 86 cm2


A.

90 cm2


As ,

Area of quad BDEC = Ar (ΔABC) - Ar (ΔADE)

                            = 98 - 8 = 90 cm2


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