The DAV Maths Book Class 4 Solutions and DAV Class 4 Maths Chapter 10 Worksheet 1 Solutions of Angles offer comprehensive answers to textbook questions.
DAV Class 4 Maths Ch 10 WS 1 Solutions
Question 1.
Tick (✓) the figures where an angle is formed.
Answer:
(b), (c) and (g)
Question 2.
Draw any four angles in your notebook.
Answer:
DAV Class 4 Maths Chapter 6 Worksheet 1 Notes
Point:
A point is an exact location.
Line segment:
Let A and B are two points.
The straight path from A to B is called the line segment AB. It is denoted by \(\overline{A B}\).
Line:
A line is an endless straight path that extends in both directions. A line has no end points. It is denoted by \(\overline{A B}\).
Ray:
A ray is a straight path having one end point and extending endlessly in one direction only. It is denoted by \(\overline{A B}\).
Acute Angle:
The angle whose measure is less than 90° is called an acute angle.
Obtuse Angle:
The angle whose measure is more than 90° is called an obtuse angle
Right Angle:
The angle whose measure is equal to 90° is called as right angle.
Straight Angle:
The angle of 180° is called as straight angle.
Question 1.
Identify the following as ray, line or line segment.
Answer:
(a) Ray
(b) Line segment
(c) Line
(d) Ray
(e) Line segment
(f) Line.
Question 2.
How many line segments are there in each?
Answer:
(a) 5
(b) 6
(c) 12
(d) 7
Question 3.
Match the following:
| A line segment has | one end point |
| → represents a | no end points |
| A ray has | two end points |
| A line segment is a part | ray |
| A line has | measured |
| A line segment can be | of a line |
Answer:
| A line segment has | two end points. |
| → represents a | ray |
| A ray has | one end point |
| A line segment is a part | of a line |
| A line has | no end points |
| A line segment can be | measured. |
Question 4.
Construct the following line segments.
(a) XY = 3 cm
Answer:
(b) CD = 4 cm
Answer:
(c) AB = 12 cm
Answer:
(d) PQ = 9 cm
Answer:
The concept of Angles:
Two rays with the same end point form an angle.
Two rays are AB and AC.
End point of AC is A.
End point of AB is A.
