Advertisements
Advertisements
प्रश्न
Medians of ΔABC intersect at G. If ar (ΔABC) = 27 cm2, then ar (ΔBGC) =
पर्याय
6 cm2
9 cm2
12 cm2
18 cm2
Advertisements
उत्तर
Given: (1) Median of ΔABC meet at G.
(2) Area of ΔABC = 27 cm2
To find: Area of ΔBCG.
We know that the medians of the triangle divides each other in the ratio of 2:1
Hence,
ar (ΔBED) = `1/2 xx BC xx GD`
ar (ΔBED) =`1/2 xx BC xx 1/3 (AD)`
ar (ΔBED) =`1/3(1/2xx AD xx BC)`
ar (ΔBED) =`1/3 (Δ ABC)`
ar (ΔBED) = = `1/3(27)`
ar (ΔBED) == 9 cm2
APPEARS IN
संबंधित प्रश्न
D is the mid-point of side BC of ΔABC and E is the mid-point of BD. if O is the mid-point
of AE, prove that ar (ΔBOE) = `1/8` ar (Δ ABC).
If ABC and BDE are two equilateral triangles such that D is the mid-point of BC, then find ar (ΔABC) : ar (ΔBDE).
In a ΔABC, D, E, F are the mid-points of sides BC, CA and AB respectively. If ar (ΔABC) = 16cm2, then ar (trapezium FBCE) =
In the given figure, ABCD is a parallelogram. If AB = 12 cm, AE = 7.5 cm, CF = 15 cm, then AD =
The sides of a rectangular park are in the ratio 4 : 3. If its area is 1728 m2, find
(i) its perimeter
(ii) cost of fencing it at the rate of ₹40 per meter.
Find the area of a rectangle whose length = 3.6 m breadth = 90 cm
Find the area of a square, whose side is: 7.2 cm.
Measure the length of the floor of your classroom in meters. Also, measure the width.
- What is the area of the floor of your classroom in square metres?
Find the area of the following figure by counting squares:
Which unit is used to express area?
