Std 6 th Mathematics- 1. Basic Concepts in Geometry

Question 1:

Look at the figure alongside and name the following:

(1) Collinear points

(2) Rays

(3) Line segments

(4) Lines

Answer 1:

(1) Collinear points :

(i) Point M, Point O, Point T

(ii) Point R, Point O, Point N

(2) Ray OM, Ray OP, Ray ON, Ray OT, Ray OS, Ray OR

(3) Seg MT, Seg RN, Seg OP, Seg ON, Seg OT, Seg OS, Seg OR, Seg OM

(4) Line MT, Line RN

Question 2:

Write the different names of the line.

Answer 2:

Line l, Line AB, Line AC, Line AD, Line BC, Line BD and Line CD.

Question 3:

	Group A		Group B
(i)		(a)	Ray
(ii)		(b)	Plane
(iii)		(c)	Line
(iv)		(d)	Line segment

Answer 3:

	Group A		Group B
(i)		(c)	Line
(ii)		(d)	Line Segment
(iii)		(b)	Plane
(iv)		(a)	Ray

Question 4:

Observe the figure below. Name the parallel lines, the concurrent lines and the points of concurrence in the figure.

Answer 4:

Parallel Lines:

(i) Line b, Line m, Line q

(ii) Line a, Line p

Concurrent Lines:

(i) Line a, Line b, Line c, Line AC

(ii) Line p, Line q, Line AD

Point of concurrence:

(i) Point A

(ii) Point D