6th Maths : Term 1 Unit 4 : Geometry : Text Book Back Exercises Questions with Answers, Solution

__Exercise
4.2__

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**1.
Use any number of the given dots to make different angles.**

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**2.
Name the vertex and sides that form each angle.**

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**3.
Pick out the Right angles from the given figures.**

**Answer:** Right angles = i, iii and v

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**4.
Pick out the Acute angles from the given figures.**

**Answer:** Acute angles = (i), (iii) and (iv)

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**5.
Pick out the Obtuse angles from the given figures.**

** Answer:**
Obtuse angles = (i) & (ii)

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**6.
Name the angle in each figure given below in all the possible ways.**

(i) ∠LMN, ∠NML ∠M

(ii) ∠PQR, ∠PQP ∠Q

(iii) ∠MNO, ∠ONM ∠N

(iv) ∠TAS, ∠SAT ∠A

(v) ∠XYZ, ∠ZYX ∠Y

(vi) ∠ADB, ∠BDA ∠D

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**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.**

** **

**8.
Draw and label each of the angles.**

**(i)
****∠****NAS **

**(ii)
****∠****BIG **

**(iii)
****∠****SMC**

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**9.
Identify the types of angles shown by the hands of the given clock.**

(i) Obtuse angle

(iv) Zero angle

(iii) Straight line

(iv) Actute angle

(v) Right angle

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**10.
Find the supplementary / complementary angles in each case.**

(i) ∠ABD = 180° − ∠CBD

= 180°− 25°

∠ABD = 155°

(ii) ∠ABD = 90° − ∠CBD

= 90° − 30° = 60°

∠ABD = 60°

(iii) ∠ABD = 90° − ∠CBD

= 90° − 46° = 44°

∠ABD = 44°

(iv) ∠ABD = 180° − ∠CBD

= 180° − 67° = 113°

∠ABD = 113°

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**Objective
Type Questions**

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**11.
In this Figure, which is not the correct way of naming an angle?**

**(a)
****∠****Y**

**(b)
****∠****ZXY**

**(c)
****∠****ZYX**

**(d)
****∠****XYZ**

**Answer:** (b) ∠ZXY

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**12.
In this Figure, ****∠****AYZ = 45°. If point
‘A’ is shifted to point ‘B’ along the ray, then the measure of ****∠****BYZ is ___________.**

**(a)
more than 45° **

**(b)
45° **

**(c)
Less than 45° **

**(d)
90°**

**Answer:** (c) Less than 45°

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__Answers: __

__Exercise 4.2__

**3) i), iii), v) are right angles**

**4) i), iii) and iv) are acute angles**

**5) i), ii) are obtuse angles**

**6) i) ****∠****LMN,
****∠****NML,
****∠****M**

**ii) ****∠****PQR,
****∠****RQP,
****∠****Q**

**iii) ****∠****MNO,
****∠****ONM,
****∠****N**

**iv) ****∠****TAS,
****∠****SAT,
****∠****A**

**v) ****∠****XYZ,
****∠****ZYX,
****∠****Y**

**vi) ****∠****ADB,
****∠****BDA,
****∠****D**

**7) i) True ii) False iii) False iv) True **

**9) i) Obtuse angle ii) Zero angle iii) Straight angle iv) Acute
angle v) Right angle **

**10) i) 155˚ ii) 60˚ iii) 44˚ iv) 113˚**

**11) b) ****∠****ZXY
c) 45˚ **

Tags : Questions with Answers, Solution | Geometry | Term 1 Chapter 4 | 6th Maths , 6th Maths : Term 1 Unit 4 : Geometry

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6th Maths : Term 1 Unit 4 : Geometry : Exercise 4.2 | Questions with Answers, Solution | Geometry | Term 1 Chapter 4 | 6th Maths

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