Page 114 - Start Up Mathematics_6

4. Match the items in Column 1 with the items in Column 2.

Column 1 Column 2

(i) Straight angle (a) Less than one-fourth of a revolution

(ii) Right angle (b) More than half a revolution
(iii) Acute angle (c) Half of a revolution

(iv) Obtuse angle (d) One-fourth of a revolution
1 1
(v) Reflex angle (e) Between and of a revolution
4 2
(f) One complete revolution

5. A figure is said to be regular if its sides are equal in length and angles are equal in measure.
Can you identify the regular quadrilateral?

Exemplar Problems

1. In the given figure, if point A is shifted to point B along the X
ray PX such that PB = 2PA, then the measure of ∠BPY is:
B
(a) greater than 45° (b) 45°
A
(c) less than 45° (d) 90° 45°
P
Y

2. The number of angles in the given figure is:

(a) 3 (b) 4

(c) 5 (d) 6 40° 20°
30°

3. If the sum of two angles is equal to an obtuse angle, then which of the following is not
possible?
(a) One obtuse angle and one acute angle

(b) One right angle and one acute angle

(c) Two acute angles

(d) Two right angles A
4. In the given figure, AB = BC and AD = BD = DC.

The number of isosceles triangles in the figure is: D
(a) 1 (b) 2
(c) 3 (d) 4 B C

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