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Understanding Elementary Shapes | Exercise 5.2

Question 1

Q4)

What part of a revolution have you turned through if you stand to face

(a) east and turn clockwise to face north?

(b) south and turn clockwise to face east?

(c) west and turn clockwise to face east?

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SOLUTION:

(i) Here, the turn from east to the south is one right angle, from south to west is one right angle and from west to the north is one right angle.

so, the turn from east to the north is three right angles.

hence, 3/4th of a revolution is required to turn from east to north.

(ii) here, the turn from the south to the east is three right angles. i.e from south to west one right angle, from west to north is one right angle, and from north to east is one right angle.

hence, 3/4th of a revolution is required to turn from south to east.

(iii) here, the turn from west to east so two right angles.

hence, 1/2 of a revolution is required from west to east.

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subject-cta

Question 1

Q4)

What part of a revolution have you turned through if you stand to face

(a) east and turn clockwise to face north?

(b) south and turn clockwise to face east?

(c) west and turn clockwise to face east?

Looking to do well in your science exam ? Learn from an expert tutor. Book a free class!

SOLUTION:

(i) Here, the turn from east to the south is one right angle, from south to west is one right angle and from west to the north is one right angle.

so, the turn from east to the north is three right angles.

hence, 3/4th of a revolution is required to turn from east to north.

(ii) here, the turn from the south to the east is three right angles. i.e from south to west one right angle, from west to north is one right angle, and from north to east is one right angle.

hence, 3/4th of a revolution is required to turn from south to east.

(iii) here, the turn from west to east so two right angles.

hence, 1/2 of a revolution is required from west to east.

Our top 5% students will be awarded a special scholarship to Lido.

subject-cta
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