@hari_bang said:quant kitni tej hai tmhari
Nai, not really :embarrassed::blush:
@anantn said:@DarkHorse25Leki square to ho sakta hai na
lekin neat and clean ek regular polygon chahiye to ans 16/8^8 hoga
a square of longest possible side is drawn inside the triangle ABC with one side of the square lying on the side BC.If AB=13,BC=21,AC=20 ,then find the side of the square ..
84/11,
7,
28/3,
31/4
Solution plz...
@hari_bang said:a square of longest possible side is drawn inside the triangle ABC with one side of the square lying on the side BC.If AB=13,BC=21,AC=20 ,then find the side of the square ..84/11,7,28/3,31/4Solution plz...
@hari_bang said:a square of longest possible side is drawn inside the triangle ABC with one side of the square lying on the side BC.If AB=13,BC=21,AC=20 ,then find the side of the square ..84/11,7,28/3,31/4Solution plz...
84/11?
height of triangle ABC = h(divides base in x and 21-x)
13^2-x^2=20^2-(21-x)^2
x=5
so height will be h= rt(13^2-5^2)=12
now let PQ be the side of square...P at side AB and Q at side AC
let side of square PQ=y
height of triangle APQ=12-y
Triangle APQ and ABC are similar
so 12-y/12=y/21
y=84/11?
@hari_bang said:mjhe bhi btao geometry kaise improve kre?
Shift to shout box/ping/PM if you want to talk.
Geom meri bhi kharab hai 
@hari_bang
Let OPQR be the required square with the side RQ lying on BC..Let AM be the height of the triangle ABC which cuts the side of the square OP at N..
Now, Area of the triangle ABC= [27(27-21)(27-13)(27-20)]^(1/2) = 126 cm^2..
Thus, Height (AM)= 126*2/21 = 12 cm..
Now, Triangle AOP and Triangle ABC are similar..
Thus, AN/AM = DE/BC, or, (12-l)/12 = l/21, or, l= 84/11 cm...
@hari_bang said:a square of longest possible side is drawn inside the triangle ABC with one side of the square lying on the side BC.If AB=13,BC=21,AC=20 ,then find the side of the square ..84/11,7,28/3,31/4Solution plz...
pic banao .. aur dekho... height of ABC = h
then h-a/h=a/21
now area of ABC =9*14=1/2*21*h or h=12
put in 1st eqn h=12 and u will get a=84/11
@hari_bang said:@DarkHorse25 sol btao bhai...mjhe gmtry me 2+2=4 bhi nhi aata
tumhe jo bhi aata hain ..aachcha hi aata hain..
@DarkHorse25 said:tumhe jo bhi aata hain ..aachcha hi aata hain..
mjhe bus 2 topic aate hain prob nd pnc...:P
one more frm geomtry
A and B are two points in a plane which are 10 m apart.The angle of elevation of tower as seen from A and B are respectively as 30 and 6o degrees..If AB subtends an angle of 60 at the foot of the tower, find the height of the tower.
ABCD is a rectangle. The points P, Q lie inside it with PQ parallel to AB. Points X, Y lie on AB (in the order A, X, Y, B) and W, Z on CD (in the order D, W, Z, C). The four parts AXPWD, XPQY, BYQZC, WPQZ have equal area. If BC = 19, PQ = 87, XY = YB + BC + CZ = WZ = WD + DA + AX, then the length of AB is
a) 241
b) 163
c) 217
d) 193
a) 241
b) 163
c) 217
d) 193
A triangle has sides 13, 14, 15. It is rotated through 180 degrees about its centroid to form an overlapping triangle. Find the area of the union of the two triangles
a) 84
b) 126
c) 56
d) none
a) 84
b) 126
c) 56
d) none