In ` A B C ,A(2pi)/3,b-c=3sqrt(3)c m` and area of ` A B C=(9sqrt(3))/2c m^2,t h e nB C=` `6sqrt(3)` (b) `9c m` (c) `18 c m` (d) `27 c m`

In a A B C ,A=(2pi)/3,b-c=3sqrt(3)c m and area ( A B C)=(9sqrt(3))/2c m^2dot then ' a ' is 6c m b. 9c m c.18c m d. none of these

In a Delta ABC,A=(2 pi)/(3),b-c=3sqrt(3)cm and area(Delta ABC)=(9sqrt(3))/(2)cm^(2). Then a is

Medians of A B C intersect at G . If a r\ ( A B C)=27\ c m^2, then a r\ ( A B G C)= 6\ c m^2 (b) 9\ c m^2 (c) 12\ c m^2 (d) 18 c m^2

A B C D is a rectangle with O as any point in its interior. If a r ( A O D)=3 c m^2a n d a r ( B O C)=6 c m^2, then area of rectangle A B C D is: 9c m^2 (b) 12 c m^2 (c) 15 c m^2 (d) 18 c m^2

A B C D E F . If B C=3c m , E F=4c m and a r( A B C)=54 c m^2 , then a r( D E F)= 108 c m^2 (b) 96 c m^2 (c) 48 c m^2 (d) 100 c m^2

A B C D is a square of side 4 cm. If E is a point in the interior of the square such that C E D is equilateral, then area of A C E is (a) 2(sqrt(3)-1)c m^2 (b) 4(sqrt(3)-1)c m^2 (c) 6(sqrt(3)-1)c m^2 (d) 8(sqrt(3)-1)c m^2

In Figure, the ratio of A D to D C is 3: 2. If the area of Delta A B C\ i s\ 40 c m^2, what is the area of Delta B D C ? (a) 16 c m^2 (b) 24 c m^2 (c) 30 c m^2 (d) 36 c m^2

The altitude of an equilateral triangle of side 2sqrt(3) c m is 1/2c m (b) (sqrt(3))/4c m (c) (sqrt(3))/2c m (d) 3 c m

In a A B C if D\ a n d\ E are mid-points of B C\ a n d\ A D respectively such that a r\ ( A E C)=4\ c m^2 , then a r\ ( B E C)= 4\ c m^2 (b) 6\ c m^2 (c) 8\ c m^2 (d) 12 c m^2

In a A B C , A D is the bisector of /_B A C . If A B=6c m , A C=5c m and B D=3c m , then D C= 11. 3 c m (b) 2. 5 c m (c) 3:5c m (d) None of these