Page 2 - CH2 – (LINES AND ANGLES)-WS

7 Number of angles less than 180° in given figure is ____ and their names are ____.

8 The number of common points in the two angles marked in given figure

9 Puzzle: I am an acute angle. If you double my measure, you get an acute angle. If you
triple my measure, you will get an acute angle again. If you quadruple (four times) my
measure, you will get an acute angle yet again! But if you multiply my measure by 5,
you will get an obtuse angle measure. What are the possibilities for my measure?

10 Assertion (A): A point has no dimension.
Reason (R): A point indicates an exact location that’s why in does not have length or
width. It is also imagined to be invisibly thin.
(a) Both A and R is true and R is the correct explanation of A.
(b) Both A and R is true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) A is false but R is true

11 Assertion (A): When a line is turned less than quarter turn it makes acute angle.
Reason (R): Acute angles are greater than 90°