Telangana SCERT Class 9 Math Solution Chapter 4 Lines and Angles Exercise 4.1

Telangana SCERT Solution Class IX (9) Math Chapter 4 Lines and Angles Exercise 4.1

(1) In the given figure, name:
(i) any six points
(ii) any five line segments
(iii) any four rays
(iv) any four lines
(v) any four collinear points

Solution:

(2)

(i) The clock has an obtuse angle

(ii) The wooden structure has a right angle

(iii) The carom board has are acute angle

(3)

(i) True

(ii) True

(iii) False, a ray has one intial point and goes upto infinity.

(iv) False

(v) True

(vi) True

(vii) False

(viii) True

(4.) What is the angle between two hands of a clock when the time in the clock is

(a) 9’O clock (b) 6’O clock (c) 7:00 PM

Solution: (a) at 9 O’ clock the angle between two hands is 90o

(b) at 6 O’ clock the angle between two hands is 180o

(c) Each jour consist of the angle of = 180o / 6 = 30o

∴ At 7:00 pm the angle between two hands is 30o x 5

= 150o


Updated: September 18, 2021 — 4:47 pm

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