Monday, June 5th, 2017
In the previous post we discussed lines, triangles, parallelograms, trapeziums, polygons etc. Now, we will discuss other expanses of geometry which are vital as, the questions on these topics are asked repeatedly in CAT. Let us look at few of the fundas / formulae on these topics that are often neglected by students and can fetch some crucial marks in the exam.
Funda 1: Angle made by Secants
In both these cases, PA * PB = PC * PD
Funda 2: Common Tangents
Note: The two centers(O and O’), point of intersection of DCTs (P)and point of intersection of TCTs (Q) are collinear. Q divides OO’ in the ratio r1 : r2 internally whearea P divides OO’ in the ratio r1 : r2 externally.
Funda 4: Co-ordinate Geometry
With this I will like to wrap up this post on Geometry. Best of Luck to all of you for CAT!