Page 1 - CBQ CL9 CH6 LINES AND ANGLES
P. 1
SAI International School
Competency Based Questions
Class- IX
Ch-6: Lines and Angles
Sl No. Questions
1 The game of billiards is played with balls placed on a rectangular table. One ball is struck with the
end of a stick, called a cue. The ball bounces into other balls and reflects off the sides of the table. In
real game, the ball may spin, but for mathematical purposes, it is considered that the ball travels in a
straight line with the same reflection and incidence angles.
On a billiard table ABCD, the ball placed at 0 is struck with the cue.
a) What is the value of a and b?
b) Why is line OM parallel to PN?
2 A parking lot for a city mall is shown below. The painted lines that separate the parking spaces are
parallel.
Q. Parking space number 378 is inclined at 60° to the horizon line. At what angle is parking space
380 Inclined to the horizontal line? Why?
