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    NCERT Solution Class 6 Maths Chapter – 4 Basic Geometrical Ideas

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     Class 6 Maths Chapter -4 Basic Geometrical Ideas

    Exercise 4.1

    Question 1:  Answer according to the figure given below

    (a) Five points
    (b) A line
    (c) Four rays
    (d) Five line segments
    Answer:

    Question 2:Name all the possible (twelve) lines choosing only two letters at a time from the figure given below.

    Answer

    Question 3:
    Answer according to the figure
    Basic Geometrical Ideas Exercise 4.2

    (a) Line containing point E.
    (b) Line passing through A.
    (c) Line on which 0 lies.
    (d) Two pairs of intersecting lines.
    Answer

    Question 4: How many lines can pass through (i) one point (ii) two points?
    Answer
    (i) There are infinite lines which can pass through one point.
    (ii) There is only one line which can pass through two given points.

    Question 5: Draw figures with label according to the information given below


    Answer
    (a)

    (b)

    (c)

    (d)

    Question 6: Consider the figure given below and answer whether the following statements are true or false.
    Basic Geometrical Ideas Exercise
    Answer
    (a) True
    (b) True
    (c) True
    (d) False
    (e) False
    (f) False
    (g) True
    (h) False
    (i) False
    (j) False
    (k) True

    Exercise 4.2

    Question 1 Answer whether the following figures are closed or open.


    Answer
    (a) Open
    (b)Closed
    (c)Open
    (d)Closed
    (e)Closed

    Question 2 Draw diagrams according to the given instructions
    (a) Closed
    (b)Open
    Answer
    (a)

    (b)

    Question 3  Draw a polygon and color its interior part.
    Answer

    Question 4: Is the given figure curve and closed?
    Answer:

    Exercise 4.3

    Question 1: Give the name of the angles in the given figure

    Answer:
    ∠CDA, ∠DAB, ∠ABC, ∠BCD

    Question 2: Name the point(s) in the figure given below

    (a) Interior angle of∠POS
    (b)Exterior angle of ∠ROT
    (c)On ∠ROT
    Answer
    (a)Q
    (b)U, Q, P
    (c)R, S, T, O

    Question 3 : Draw diagrams having two angles such that they have
    (a)One point common
    (b)Two points common
    (c)Three points common
    (d)Four points common
    (e)One ray common
    Answer
    (a)

    ∠QOS and ∠POR have O common point.

    (b)

    ∠ZOY and ∠YOX have O and Y common points.

    (c)

    ∠YOX and ∠YOZ have Y, W and O common points.

    (d)

    ∠COP and ∠COQ have C, B, A and O common points.

    (e)

    Exercise 4.4

    Question 1: Draw a sketch of triangle PQR. Mark a point A interior and a point B in its exterior. Is the point Q is in its interior or in its exterior?
    Answer:

    Point Q lies on the ΔPQR .

    Question 2: Draw a sketch of triangle XYZ. Mark a point L interior and a point M in its exterior. Is the point L is in its interior or in its exterior?
    Answer:

    Point L lies on the interior of the triangle.

     

     

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