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Geometry for CAT 2011 Quantitative

Hi Guys,
Geometry, Algebra and Number system form the major chunk of our QA section for CAT.
Proficiency in these three sections would definitely boost our Quants scores.
Contents of Geometry
1. Plane Geometry - Basics and Triangles
2. Polygons and Quadrilaterals
3. Circle
4....
pdf file pdf file pdf file pdf file pdf file pdf file pdf file pdf file
85 84
Can I ask a doubt here how you reach that ADE is a straight Line??
Can you please clarify this?
wats the ans?????
In an acute angle triangle all the angles are positive integers and 13 times one angle is equal to 17 times another angle then what could be the minimum angle??
Please solve it ..i dint get it after trying for 3 hrs
ans can also be 30 ,65,85..
30+65+85=180...all are positive integers.......
Correct. My bad
How 2 wrongs make up for one right answer...
If ADF is x then BDF = 2x. => DBE = 2x=> EDC = 4x. Total unshaded = 9x.
Then BEA = 6x and ABC = 18x. Since 18x = 1, 9x = 1/2!
1 1
yes u r right ... i too get 1/2
Hi tukku,
Let area of ADF be x then BDF will be 3x. { traingles on same line segment and common vertex have their areas in ratio of their bases }
As BDF is 3x, DBE will also be 3x. And thus EDC will be 9x.
Total unshaded portion is 16x.
Now draw a line EA. DFA is x so EDA is x.
The...
3 3
Hi,
The approach is simple.. avoid all confusions of what height has come down, etc.. just stick to the difference of volume ' V ' which is proportional to surface area at a given time.
2/3V-1/2V = K*pi*R2
1/2V- xV = K*pi*r2
Here R is initial surface radius, which can be found by co...
hi can sm1 pls solve this question for me.. i m unable to solve it.. at least give an approach.. i will at least try.. thanks...
hi cud sm1 please help me with this.. i m unable to solve this question.. thanks..!!
ABC is a triangle with area 1. AF = AB/3, BE = BC/3 and ED = FD. Find the area of the shaded figure.
Choose one answer.
a. 1/2 b. 5/9 c. 1/3 d. 13/16
I think the answer should be 1/2
tell me the OA
I am unable to download the pdfs..Please suggest
Chk solution in attached pic in my post.
for detail solution plz see attached image
1 1
How do i form the equation. can you please explain ?
ABC is a triangle with area 1. AF = AB/3, BE = BC/3 and ED = FD. Find the area of the shaded figure.
Choose one answer.
a. 1/2 b. 5/9 c. 1/3 d. 13/16
2 2
Hi puys,
Please solve the below qstion:
Two circles C(O,r) and C(O',r') intersect at two points A and B. A tangent CD is drawn to the circle C(O',r') at A. then
1) /_OAC=/_OAB 2) /_OAB=/_AO'O
3) /_AO'B=/_AOB 3) /_OAC=/_OAB
the question is from LOD2(Geometry) Arun Sharma Qno. 21.
can we take like this way ,
Perimeter P = 2a + 2b, by joining two trapezium we get,
so a= 60, b=20
we will get 160
13x17=17x13...any doubts regarding that?? so the angles are 65,85,30