CHAPTER-2
SHAPES AND ANGLES
PRACTICE TIME:
(1) Look at the shape and the answer.
The angle marked in ________ colour is the biggest angle.
Ans. The angle marked in black colour is the biggest angle.
2 (a) Are the angles marked with yellow equal? ________
(b) Are the angles marked with green equal? ________
(c) Are the angles marked with blue equal? ________
Ans. (a) Yes, the angles marked with yellow are equal.
(b) Yes, the angles marked with green are equal.
(c) Yes, the angles marked with blue are equal.
3. Four different angles are marked in four colours. Can you find other angles which are the same as the one marked in red? Mark them in red. Do this for the other colours.
Sol. Yes, the marked in yellow is the same as the red one. Other angles which are the same as the one marked in red are marked red in the figure.
4. Sukhman made this picture with so many angles.
Use colour pencils to mark
1. Right angles with black colour.
2. Angles which are more than a right angle with green.
3. Angles which are less than a right angle with blue.
Ans. (1) In the above figures right angles are marked with letter ’R’.
(2) Angles which are more than a right angle are marked with letter ‘M’.
(3) Angles which are less than a right angle marked with letter ‘L’.
5. Draw anything of your choice around the angle shown. Also write what kind of angle it is. The first one is done.
Ans.
A right angle
A right angle
More than a right angle
Less than a right angle
Less than a right angle6.
These are two slide in a park.
1. Which slide has a larger angle?
2. Which slide do you think is safer for the little boy? Why?
Ans. (1) The slide on the left side has a larger angle.
(2) The slide on the right side is safer for the little boy because of its smaller angle.
7. Write what kind of angle is made by the hands at these times. Also write the time.
Ans. Let these watches be marked as (a), (b), (c), (d)and(e) as shown above. The time given in the following table.
| Clock | Angles made by the hands | Time |
| (a) | Less than a right angle | 25 minutes past 7 |
| (b) | More than a right angle | Quarter past 8 |
| (c) | More than a right angle | 10 minutes past 9 |
| (d) | More than a right angle | 25 minutes past 9 |
| (e) | Less than a right angle | 10’o clock |
