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Practice each question, then open the answer or worked solution.
The number of lines of symmetry in a rectangle and a square are______ (equal/unequal).
Solution:-
The number of lines of symmetry in a rectangle and a square are unequal.
If a line segment of length 5cm is reflected in a line of symmetry (mirror), then its reflection (image) is a ______ of length _______.
Solution:-
If a line segment of length 5cm is reflected in a line of symmetry (mirror), then its reflection (image) is a line segment of length 5cm.
If an angle of measure 80o is reflected in a line of symmetry, then the reflection is an ______ of measure _______.
Solution:-
If an angle of measure 80o is reflected in a line of symmetry, then the reflection is an angle of measure 80o.
The image of a point lying on a line l with respect to the line of symmetry l lies on _______.
Solution:-
The image of a point lying on a line l with respect to the line of symmetry l lies on line l.
In Fig. 9.10, if B is the image of point A with respect to the line l and P is any point lying on l, then the lengths of line segments PA and PB are _______.
Solution:-
In Fig. 9.10, if B is the image of point A with respect to line l and P is any point lying on l, then the lengths of line segments PA and PB are equal.
The number of lines of symmetry in Fig. 9.11 is__________.
Solution:-
The number of lines of symmetry in Fig. 9.11 is 5.
The common properties in the two set-squares of a geometry box are that they have a __________ angle and they are of the shape of a __________.
Solution:-
The common properties in the two set-squares of a geometry box are that they have a right angle and they are of the shape of a triangle.
The digits having only two lines of symmetry are_________ and __________.
Solution:-
The digits having only two lines of symmetry are 0 and 8.
The digit having only one line of symmetry is __________.
Solution:-
The digit having only one line of symmetry is 3.
The number of digits having no line of symmetry is_________.
Solution:-
The number of digits having no line of symmetry is 7.
The digits having no line of symmetry are 1, 2, 4, 5, 6, 7 and 9