DAV Class 4 Maths Chapter 10 Worksheet 3 Solutions

The DAV Maths Book Class 4 Solutions and DAV Class 4 Maths Chapter 10 Worksheet 3 Solutions of Angles offer comprehensive answers to textbook questions.

DAV Class 4 Maths Ch 10 WS 3 Solutions

Question 1.
Use the protractor and measure the following angles.
DAV Class 4 Maths Chapter 10 Work Sheet 3 Solutions 1
Answer:
45°

DAV Class 4 Maths Chapter 10 Work Sheet 3 Solutions 2
Answer:
70°

DAV Class 4 Maths Chapter 10 Work Sheet 3 Solutions 3
Answer:
110°

DAV Class 4 Maths Chapter 10 Work Sheet 3 Solutions 4
Answer:
35°

DAV Class 4 Maths Chapter 10 Work Sheet 3 Solutions 5
Answer:
90°

DAV Class 4 Maths Chapter 10 Work Sheet 3 Solutions 6
Answer:
115°

DAV Class 4 Maths Chapter 10 Work Sheet 3 Solutions 7
Answer:
120°

DAV Class 4 Maths Chapter 10 Work Sheet 3 Solutions 8
Answer:
180°

DAV Class 4 Maths Chapter 10 Worksheet 3 Solutions

Question 2.
Construct angles of the following measures. Label the angles and name them.
(a) 40°
Answer:
DAV Class 4 Maths Chapter 10 Work Sheet 3 Solutions 9
∠PQR = 40°

(b) 75°
Answer:
DAV Class 4 Maths Chapter 10 Work Sheet 3 Solutions 10
∠ABC = 75°

(c) 90°
Answer:
DAV Class 4 Maths Chapter 10 Work Sheet 3 Solutions 11
∠XYZ = 90°

(d) 100°
Answer:
DAV Class 4 Maths Chapter 10 Work Sheet 3 Solutions 12
∠LMN = 100°

(e) 120°
Answer:
DAV Class 4 Maths Chapter 10 Work Sheet 3 Solutions 13
∠DEF = 120°

(f) 155°
Answer:
DAV Class 4 Maths Chapter 10 Work Sheet 3 Solutions 14
∠STR = 155°

DAV Class 4 Maths Chapter 10 Worksheet 3 Notes

Measuring Angles:
The standard unit of an angle is Degree. The symbol (°) is used for degree. We use protractor to measure an angle.
DAV Class 4 Maths Chapter 10 Work Sheet 3 Solutions 15
There are two rows of numbers marked on the protractor. Numbers are marked from 0 to 180. It has two scales in reverse order. Measuring ZABC

  • Step I: Place the centre of the protractor on the vertex B of ∠CBA. Adjust the arm BA.
  • Step II: Look for the scale which begins with zero.
  • Step III: Read the mark on the protractor where the other arm (\(\overrightarrow{\mathrm{BC}}\)) of the angle crosses the scale on the protractor.

∠ABC = 80° as shown in figure. Angles opening to left increases from left to right. Angles opening to right increases from right to left.