In Fig. 11.16, list the points which are: (i) in the interior of ∠ P (ii) in the exterior of ∠ P and (iii) lie on∠ P.
In Fig. 11.19, which of the following statements are true:
(i) Point B is the interior of ∠ AOB.
(ii) Point B is the interior of ∠ AOC.
(iii) Point A is the interior of ∠ AOD.
(iv) Point C is the interior of ∠ AOB.
(v) Point D is the exterior of ∠ AOC.
Which of the following statements are true:
(i) The vertex of an angle lies in its interior.
(ii) The vertex of an angle lies in its exterior.
(iii) The vertex of an angle lies on it.
By simply looking at the pair of angles given in Fig. 11.20, state which of the angles in each of the pairsis greater:
Shikha is rowing a boat due north-east. In which direction will she be rowing if she turns itthrough:
(i) a straight angle
(ii) a complete angle
What is the measure of the angle in degrees between:
(i) North and West?
(ii) North and South?
(iii) North and South- East?
A ship sailing in river Jhelam moves towards east. If it changes to north, through what angle doesit turn?
You are standing in a class-room facing north. In what direction are you facing after making aquarter turn?
Look at your watch face. Through how many right angles does the minute-hand moves between 8: 00 O’ clock and 10: 30 O’ clock?
Classify the following angles as acute, obtuse, straight, right, zero and complete angle:
(xiii) 90 ½ o
Using only a ruler, draw an acute angle, a right angle and an obtuse angle in your notebook andname them.
State the kind of angle, in each case, formed between the following directions:
(i) East and West
(ii) East and North
(iii) North and North-East
(iv) North and South-East
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