Is there any1 who knows the concept of polygon inside polygon? Its done in byju's class but i cudnt attend tat session...pls post it here by u knw the concept.
Thnx in advance.

SET-24

A question from the recent mock

The shape of a solid plastic toy is shown in the figure given below. The structure consists of a cylinder, frustum of a cone and a hemisphere. The height and radius of the cylinder are H/2 and r respectively. The radius of the hemisphere is R. The height and base radius of the original cone were H and R respectively. If H = 2R = 4r, then what is the volume of the toy?



a
b
c
d

ashishkakkar123 Says

guys like in equilateral triangle orthicentre= in centre = centrod=circumcentre. does isocles triangle follow this property as perpendicular bisector , median ,angle bisector altitude of it are same as n equilateral triangle....

160.
new equilateral triangle ki side = 20

Suja

barclays_boss Says

Ok solve this :

barclays_boss Says

Ok solve this :

alankritaa Says

Answer is 5:6

quantphobic Says

can anyone tell me how to solve this?

SET-23

The figure given below shows a triangle ABC that circumscribes a circle of radius 3 cm. D is the point of contact of the circle with the side AB. AD = 4 cm and BD = 6 cm. What is the ratio of AC to BC?

ramachandran can you please mail me the same ??

Thanks...i have PM u ma mail id...can u pls send me all the basic and advanced materials of Geometry for CAT 11 ??

Cheers,
Dev

alankritaa Says

Answer is 5:6

alankritaa Says

Answer is 5:6

SET-23

The figure given below shows a triangle ABC that circumscribes a circle of radius 3 cm. D is the point of contact of the circle with the side AB. AD = 4 cm and BD = 6 cm. What is the ratio of AC to BC?

nramachandran Says

Please PM me your mail ID. I will mail u the same

SET 20
In ABC,AB=3 cm and AC= 4 cm.If D is a point on BC such that AD bisects A and BD >2.15 cm,which of the following is a possible value of A?
(1)60
(2)75
(3)90
(4)120

SET-18

The three sides AB, BC and CA of a triangle ABC are 7 cm, 10 cm and 12 cm long respectively. AB is extended to D and AD = 28 cm. BC is extended to E and BE = 20 cm. CA is extended to F and CF = 36 cm. What is the ratio of the area of triangle ABC to the area of triangle DEF?


Figure attached

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

anishgulati Says

Q.22&Q23; well to be honest i couldn't get the solution so help required

mbafrmfms Says

AIMCAT1210 Attached query Plz explain

anishgulati Says

Q.22&Q23; well to be honest i couldn't get the solution so help required

A simple question (might be, but I have some confusion---)

Find the area enclosed by the region in square units described by x+|y|>=1 and |x|+|y<=2.

options -

A 6
B 8
C 12
D 15

hey buddy, thanks for the material provided, but the problem is --- unable to download the pdf....plz help me in this...

thanks

SET - 21

A conical vessel, with a circular base, is filled with water to two-thirds of its volume. The pointed end of the cone is snipped off and replaced with a lid. The lid is kept open for 10 hours every day during which some water evaporates. The volume of the water that evaporates on a day is directly proportional to the area of the water surface at the beginning of the day. The volume of the water left in the container after evaporation on the 1st day is half the volume of the original cone. If V is the volume of the original cone, then what is the volume of the water that evaporates on the 2nd day?





a.

b.

c.

d.

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. Mensuration
5. Trignometry
6. coordinate Geometry


Lets have this thread dedicated to discussing Geometry.

I have attached the lessons from class X NCERT maths book. Its very useful in building up the fundas

PS: link to the previous geometry thread - http://www.pagalguy.com/forum/quantitative-questions-and-answers/856-geometry.html

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

guravus Says

is it 52??

is it 39 by any chance??

The Angles of that triangle are 52,60,68.
So min can be 52.

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

is it 39 by any chance??

spectramind07 Says

You post your attempt.It will be better to point out where you are going wrong.:D

I am getting the answer 6/11
how is the answer 3/4 coming?pls give the sol in detail...

SET-19
Two circles touch each other at point Q. Two common tangents to the circles, none of which passes through Q, meet at point F. These tangents touch the larger circle at points D and E. The radius of the larger circle is 3 units and the length of DF is 4 units. What is the radius of the smaller circle (in units)?

spectramind07 Says

BD is given as > 2.15cm.A> 90.So 120 is the answer.

3,4,5 can be a pythagorian triplet in which case BD will be 2.5 and Triangle ABC would be a right angled triangle with the right angle at A.

Why 120?

SET 20
In ABC,AB=3 cm and AC= 4 cm.If D is a point on BC such that AD bisects A and BD >2.15 cm,which of the following is a possible value of A?

(1)60
(2)75
(3)90
(4)120

If A is 90, BD/DC = 3/4 and BC = 5
That would mean, DC = 2.857 and BD = 2.142
But, BD> 2.15
So, 120 can be the possible value.

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

SET 20
In ABC,AB=3 cm and AC= 4 cm.If D is a point on BC such that AD bisects A and BD >2.15 cm,which of the following is a possible value of A?

(1)60
(2)75
(3)90
(4)120

SET-19

Two circles touch each other at point Q. Two common tangents to the circles, none of which passes through Q, meet at point F. These tangents touch the larger circle at points D and E. The radius of the larger circle is 3 units and the length of DF is 4 units. What is the radius of the smaller circle (in units)?