Basic Geometrical Ideas-Solutions Ex-4.3

CBSE Class –VI Mathematics
NCERT Solutions
Chapter 4 Basic Geometrical Ideas (Ex. 4.3)

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Question 1. Name the angles in the given figure:

Answer: There are four angles in given figure:

∠$\mathrm{\angle }$ABC, ∠$\mathrm{\angle }$CDA, ∠$\mathrm{\angle }$DAB, ∠$\mathrm{\angle }$DCB

Question 2. In the given diagram, name the point(s):

(a) In the interior of ∠$\mathrm{\angle }$DOE.

(b) In the exterior of ∠$\mathrm{\angle }$EOF.

(c) On ∠$\mathrm{\angle }$EOF.

Answer: (a) Point interior of ∠$\mathrm{\angle }$DOE : A

(b) Points exterior of ∠$\mathrm{\angle }$EOF : C, A, D

(c) Points on ∠$\mathrm{\angle }$EOF : E, O, B, F

Question 3. Draw rough diagrams of two angles such that they have:

(a) One point in common.

(b) Two points in common.

(c) Three points in common.

(d) Four points in common.

(e) One ray in common.

Answer:
(a) 
(b) 
(c) 
(d) 
(e)