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Q.

In a triangle ABC, if D is the midpoint of BC and E is the midpoint of AD, then area of triangle BED is:


In a triangle ABC, E is the midpoint of median AD. Show that from  Mathematics Areas of Parallelograms and Triangles Class 9 Punjab Board

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a

1 2   area of triangle ABD

b

1 3   area of triangle ABD

c

1 4   area of triangle ABD

d

2 3   area of triangle ABD 

answer is A.

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Detailed Solution

Given a triangle ABC in which D is the midpoint of BC and E is the midpoint of AD.
In a triangle ABC, E is the midpoint of median AD. Show that from  Mathematics Areas of Parallelograms and Triangles Class 9 Punjab BoardAs the median divides the triangle into 2 parts having equal area, AD is median.
Area of triangle ABD = 1 2   area of triangle ABC
Similarly, as BE is median.
Area of triangle BED = 1 2   area of triangle ABD
Hence, option 1 is correct.
 
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