In a triangle `ABC`, `E` is the mid-point of median `AD`. Show that `a r\ (B E D)=1/4a r\ (A B C)```
Text Solution
Verified by Experts
We know, the median of a triangle, divides the triangle into two triangles of equal areas.
So, in `Delta ABC`
`ar(ACD)=ar(ABD) = 1/2ar(ABC)->(1)`
Also, we are given,`E` is the mid-point of `AD` that means `BE` is the median of `Delta ABD`
So,
`ar(BED)=ar(AEB) = 1/2ar(ABD)`
From (1),
`ar(BED) = 1/2(1/2ar(ABC))`
...
Topper's Solved these Questions
AREAS OF PARALLELOGRAMS AND TRIANGLES
NCERT|Exercise Solved Examples|4 Videos
AREAS OF PARALLELOGRAMS AND TRIANGLES
NCERT|Exercise Exercise 9.2|6 Videos
CIRCLES
NCERT|Exercise EXERCISE 10.2|2 Videos
Similar Questions
Explore conceptually related problems
In a ABC,E is the mid-point of median AD Show that ar(BED)=(1)/(4) ar (ABC)
In a triangle ABC, E is the mid-point of median AD. Show that ar (triangleBED)=1/4 ar( triangleABC ).
If A D is a median of a triangle A B C ,\ then prove that triangles A D B\ a n d\ A D C are equal in area. If G is the mid-point of median A D , prove that a r\ ( B G C)=2a r\ (\ A G C)
A B C is a triangle in which D is the mid-point of B C and E is the mid-point of A Ddot Prove that area of B E D=1/4a r e aof A B Cdot GIVEN : A A B C ,D is the mid-point of B C and E is the mid-point of the median A Ddot TO PROVE : a r( B E D)=1/4a r( A B C)dot
D is the mid-point of side B C of \ A B C\ a n d\ E is the mid-point of B Ddot If O is the mid-point of A E , prove that a r\ (\ B O E)=1/8a r\ (\ A B C)
In A A B C ,\ P\ a n d\ Q are respectively the mid-points of A B\ a n d\ B C and R is the mid-point of A Pdot Prove that: a r\ (\ P R Q)=1/2a r\ (\ A R C)
In A A B C ,\ P\ a n d\ Q are respectively the mid-points of A B\ a n d\ B C and R is the mid-point of A Pdot Prove that: a r\ ( R Q C)=3/8\ a r\ (\ A B C)
D is the mid-point of side B C of A B C and E is the mid-point of B Ddot If O is the mid-point of A E , prove that a r( B O E)=1/8a r( A B C)
In A A B C ,\ P\ a n d\ Q are respectively the mid-points of A B\ a n d\ B C and R is the mid-point of A Pdot Prove that: a r\ ( P B Q)=\ a r\ (\ A R C)
In Figure, A B C\ a n d\ B D E are two equilateral triangls such that D is the mid-point of B CdotA E intersects B C in Fdot Prove that: a r( B D E)=1/4a r\ (\ A B C)
NCERT-AREAS OF PARALLELOGRAMS AND TRIANGLES-EXERCISE 9.1