Students can download Maths Chapter 4 Geometry Ex 4.2 Questions and Answers, Notes, Samacheer Kalvi 6th Maths Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 1 Chapter 4 Geometry Ex 4.2

Question 1.
Use any number of the given dots to make different angles.
(i) An Accute angle
Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2 1
(ii) An Obtuse Angle
Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2 2
(iii) A Right Angle
Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2 3
(iv) A Straight Angle
Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2 4
Solution:
(i) An Accute angle
Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2 5

Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2

(ii) An Obtuse Angle
Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2 6

(iii) A Right Angle
Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2 7

(iv) A Straight Angle
Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2 8

Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2

Question 2.
Name the vertex and sides that form each angle.
Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2 9
Solution:
(i) D, DE and DF
(ii) D, DE and DC
(iii) P, PQ and PR
(iv) S, SV and ST

Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2

Question 3.
Pick out the Right angles from the given figures.
Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2 10
Solution:
(i), (iii), (v)

Question 4.
Pick out the Accute angles from the given figures.
Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2 11
Solution:
(i), (iii), (iv) are the Acute Angles.

Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2

Question 5.
Pick out the Obtuse angles from the given figures.
Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2 12
Solution:
(i) and (ii) are the Obtuse Angles.

Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2

Question 6.
Name the angle in each figure given below in all the possible ways.
Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2 13
Solution:
(i) ∠M or ∠LMN or ∠NML
(ii) ∠Q or ∠PQR or ∠RQP
(iii) ∠N or ∠MNO or ∠ONM
(iv) ∠A or ∠TAS or ∠SAT
(v) ∠Y or ∠XYZ or ∠ZYX
(vi) There are 3 angles in (vi)

  • ∠ADC or ∠CDA
  • ∠ CDB or ∠BDC
  • ∠D or ∠ADB or ∠BDA

Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2

Question 7.
Say True or False.
(i) 20° and 70° are complementary.
(ii) 88° and 12° are complementary.
(iii) 80° and 180° are supplementary.
(iv) 0° and 180° are supplementary.
Solution:
(i) True
Hint: 20°+ 70° = 90°
(ii) False
Hint: 88° + 180° = 260° ≠ 1
(iii) False
Hint: 80° + 180° = 260° ≠ 1
(iv) True
Hint: 0° + 180° = 180°

Question 8.
Draw and label each of the angles.
(i) ∠NAS = 90°n
(ii) ∠BIG = 35°
(iii) ∠SMC = 145°
Solution:
Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2 14

Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2

Question 9.
Identify the types of angles shown by the hands of the given clock.
Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2 15
Solution:
(i) Obtuse angle
(ii) Zero angle
(iii) Straight angle
(iv) Acute angle
(v) Right angle

Question 10.
Find the supplementary/complementary angles in each case.
Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2 16
Solution:
Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2 17

Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2

Objective Type Questions

Question 11.
In this figure, which is not the correct way of naming an angle?
Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2 18
(a) ∠Y
(b) ∠ZXY
(c) ∠ZYX
(d) ∠XYZ
Solution:
(b) ∠ZXY

Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2

Question 12.
In this figure, ∠AYZ = 45. If point ‘A’ is shifted to point ‘B’ along the ray, then the measure of ∠BYZ is
Samacheer Kalvi 6th Maths Guide Term 1 Chapter 4 Geometry Ex 4.2 19
(a) more than 45°
(b) 45°
(c) less than 45°
(d) 90°
Solution:
(b) 45°

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