# User Forum

Subject :IMO    Class : Class 5

In the given figure, which line is perpendicular to AB?

A CD
B EF
C GH
D IJ

it, can be line segment IJ

Class : Class 7

Class : Class 8

Class : Class 4
ans is c

Class : Class 7

## Ans 5:

Class : Class 6
This question is itself wrong..

Class : Class 6

## Ans 7:

Class : Class 8
do not worry sof will make the same mistake on paper

## Ans 8:

Class : Class 5
ans 7 is right. perpendicular = 90 degree intersecting straight lines

Class : Class 6

Class : Class 7

Class : Class 8
It's cofusing

Class : Class 5
right

Class : Class 7

Class : Class 9

## Ans 15:

Class : Class 6
It is B since GH is not perpendicular by the smallest of angles. EF is perpendicular since if you look at the triangles or 5-sided shapes that are made when lines AB and EF come through a square with an angle not equal to 45 degrees, the sizes are the same. This shows that AB and EF are a pair of perpendicular lines.

Class : Class 5

Class : Class 5

## Ans 18:

Class : Class 6
The answer is C] GH Because if we count the blocks in AB then, it's4 If we count the blocks in GH then, it's4 THIS S MY FORMULAE

## Ans 19:

Class : Class 7
b is totally correct just see the blocks carefully

Class : Class 8

## Ans 21:

Class : Class 7
B is the correct answer guys, look at the blocks carefully.

## Ans 22:

Class : Class 4
Wrong options SOF.!!!!!! Do you want us to fail

Class : Class 6

Class : Class 7
it should be C

## Ans 25:

Class : Class 6
All transversal lines look perpendicular

Class : Class 6