Page 103 - Revised Maths Wisdom Class - 6

Lines and Angles 101

2. The figure formed by two rays with the same initial point is known as:
(a) a ray (b) a line (c) an angle (d) a line segment
3. Which of the following has one end point?
(a) a line (b) a line segment (c) a ray (d) none of these

4. The vertex of an angle lies:
(a) on the angle (b) in its exterior (c) in its interior (d) none of these
5. An angle of measure 360° is called:
(a) a zero angle (b) a straight angle (c) a complete angle (d) a reflex angle

6. If you are facing east and turn clockwise through 270°, which direction would you face?
(a) South (b) North (c) East (d) West
7. An acute angle is formed between the hands of a clock at:
(a) 6 O’clock (b) 8 O’clock (c) 11 O’clock (d) 9 O’clock

C Fill in the Blanks Fill in the Blanks

1. A _______ is a part of a line. 2. A ray has _______ length.
3. 179° is a/an _______ angle. 4. The angle name for half a revolution is a _______.

5. When the sum of the measures of two angles is that of a straight angle and if one of them is acute, then the
other should be _______.

D Write ‘t’ FOr true and ‘F’ FOr False stateMents Write ‘t’ FOr true and ‘F’ FOr False stateMents
1. An acute angle lies between 0° and 90°.

2. Sum of angles about a point is 360°.

3. An obtuse angle is an angle where measure is less than 90°.

4. An angle whose measure lies between 180° and 360° is called a reflex angle.

E Case study Based QuestiOns Case study Based QuestiOns
Consider the movement of the hands of a clock from one position to another, it turns through an angle.

Answer the following questions on the basis of above data:
1. How many degrees are there in 3 right angles?

(a) 90° (b) 180° (c) 270° (d) 360°
2. Find the number of right angles turned through by the hour hand of a clock when it goes from 2 to 8?

(a) 3 right angles (b) 2 right angles (c) One right angle (d) 360°