Question

Find the number of right angles turned through by the hour hand of a clock when it goes from 12 to 3

Answer 1

Answer:

The hour hand of a clock revolves by 360° or 4 right angles in one complete round. (a) The hour hand of clock revolves by 90° or one right angle when it goes from 3 to 6. (b) The hour hand of clock revolves by 180° or 2 right angles when it goes from 2 to 8.

Step-by-step explanation:

Answer 2

Given,

Hour hand of a clock goes from 12 to 3.

Solution,

Know that hands of clock turned in clockwise direction.

When hour hand go from 12 to 3, it cover $\[\frac{1}{4}\]$ of the total hour hand rotation in 12 hour.

Total rotation of hour hand $\[ = 360^\circ \]$

Angle turned by hour hand from 12 to 3,

$\[\begin{array}{l} = \frac{1}{4} \times 360^\circ \\ = 90^\circ \end{array}\]$

Hence the angle turned by hour hand of clock is $\[90^\circ \]$ from 12 to 3.