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NCERT solutions for Maths Basic geometrical ideas Download as PDF
NCERT Solutions for Class 6 Maths Basic geometrical ideas
Class –VI
Mathematics
(Ex. 4.1)
Question 1.Use the figure to name:
(a)Five points
(b)A line
(c)Four rays
(d)Five line segments
Answer:
(a) Five points are: O, B, C, D, E
(b) A line: {tex}\overline {{\text{DE}}} ,{/tex}{tex}\overline {{\text{DB}}} ,{/tex}{tex}\overline {{\text{OE}}} ,{/tex}{tex}\overline {{\text{OB}}} {/tex}
(c) Four rays: {tex}\overrightarrow {{\text{OD}}} ,{/tex}{tex}\overrightarrow {{\text{OE}}} ,{/tex}{tex}\overrightarrow {{\text{OC}}} ,{/tex}{tex}\overrightarrow {{\text{OB}}} {/tex}
(d) Four line segments: {tex}\overline {{\text{DE}}} ,{/tex}{tex}\overline {{\text{OE}}} ,{/tex}{tex}\overline {{\text{OC}}} ,{/tex}{tex}\overline {{\text{OB}}} ,{/tex}, {tex}\overline {{\text{OD}}} {/tex}
NCERT Solutions for Class 6 Maths Exercise 4.1
Question 2.Name the line given in all possible (twelve) ways, choosing only two letters at a time from the four given.
Answer: {tex}\overline {{\text{AB}}} ,{/tex}{tex}\overline {{\text{AC}}} ,{/tex}{tex}\overline {{\text{AD}}} ,{/tex}{tex}\overline {{\text{BC}}} ,{/tex}{tex}\overline {{\text{BD}}} ,{/tex}{tex}\overline {{\text{CD}}} ,{/tex}{tex}\overline {{\text{BA}}} ,{/tex}{tex}\overline {{\text{CA}}} ,{/tex}{tex}\overline {{\text{DA}}} ,{/tex}{tex}\overline {{\text{CB}}} ,{/tex}{tex}\overline {{\text{DB}}} ,{/tex}{tex}\overline {{\text{DC}}} {/tex}
Question 3.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.
Answer: (a) A line containing E = {tex}\overline {{\text{AE}}} {/tex} or {tex}\overline {{\text{FE}}} {/tex}
(b) A line passing through A = {tex}\overline {{\text{AE}}} {/tex} or {tex}\overline {{\text{DE}}} {/tex}
(c) A line on which O lies = {tex}\overline {{\text{CO}}} {/tex} or {tex}\overline {{\text{OC}}} {/tex}
(d) Two pairs of intersecting lines are : {tex}\overline {{\text{AD}}} ,{/tex}{tex}\overline {{\text{CO}}} {/tex} and {tex}\overline {{\text{AE}}} {/tex}, {tex}\overline {{\text{FE}}} {/tex}
NCERT Solutions for Class 6 Maths Exercise 4.1
Question 4.How many lines can pass though:
(a) one given point?
(b) two given points
Answer: (a) Infinite number of lines can pass through one given point.
(b) Only one line can pass through two given points.
Question 5.Draw a rough figure and label suitably in each of the following cases:
(a)Point P lies on {tex}\overline {{\text{AB}}} .{/tex}
(b) {tex}\overline {{\text{XY}}} {/tex} and {tex}\overline {{\text{PQ}}} {/tex} intersect at M.
(c) Line {tex}l{/tex} contains E and F but not D.
(d) {tex}\overline {{\text{OP}}} {/tex} and {tex}\overline {{\text{OQ}}} {/tex} meet at O.
Answer: Sol.
NCERT Solutions for Class 6 Maths Exercise 4.1
