Page 174 - ICSE Math 6

PRACTICE TIME

1. Solve.

(a) 120° 15′ 25″ + 122° 36″ (b) 180° 59′ 16″ – 99° 58′ 20″
(c) 360° 22″ – 258° 36′ 50″ (d) 232° 45′ + 30° 50″

2. Measure the following angles using a protractor.

(a) (b) (c)

(d) (e) (f)

3. Construct the following angles using a protractor.

(a) 16° (b) 90° (c) 260° (d) 346° (e) 190°

4. In the adjoining figure, name the following. B C
(a) Acute angle(s) with OE as one of the arms. A D
(b) Right angle(s) with OE as one of the arms.
(c) Obtuse angle(s) with OE as one of the arms. O E

5. A bicycle wheel takes three and a half turns. Find the number of right angles through which it
turns.
6. On a clock face, through how many right angles does the minute hand move between
9:00 a.m. to 11:30 a.m?
7. Draw an angle of measure 60°. Enlarge it by extending its arms further. Does the measure of the
angle change?

8. State the type of angles along with their measure on the following clock faces.

(a) (b) (c) (d)

9. A ship in the sea needs to take a turn of 32° 45' 52'' to reach its destination. By mistake, it is
turned by 40° 28' 57''. By how much angle should it turn back to get on the right path?

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