Chapter 4: Basic Geometrical Ideas
Exercise 4.1
Q1. Use the figure to name:
(a) Five points
(b) A line
(c) Four rays
(d) Five line segments
Ans.
(a) Five points are:
(b) A line:
(c) Four rays:
(d) Four line segments:
Q2. Name the line given in all possible (twelve) ways, choosing only two letters at a time from the four given.
Ans. 
Q3. Use the figure to name:
(a) Line containing point E.
(b) Line passing through A.
(c) Line on which O lies.
(d) Two pairs of intersecting lines.
Ans.
Q4. How many lines can pass through:
(a) one given point?
(b) two given points
Ans.
(a) Infinite number of lines can pass through one given point.
(b) Only one line can pass through two given points.
Q5. Draw a rough figure and label suitably in each of the following cases:
Ans.
(a)
(b)
(c)
(d)
Q6.
Ans.
(a) True
(b) True
(c) True
(d) False
(e) False
(f) False
(g) True
(h) False
(i) False
(j) False
(k) True