Page 234 - Start Up Mathematics_7

4. Estimate the angle of rotation about O in clockwise direction, which each figure should go
through to attain a new position as shown.

O
(a) (b)
O O
O

(c) O O (d)
O
O

5. Find the order of rotational symmetry and angle of rotation of the following figures.

(a) (b) (c)

(d) (e) (f)

6. In the adjoining figure, ∆ PQR is reflected in line l.
l
(a) Is PM = P′M? P

(b) Is PP′ parallel to RR′? Q M
(c) Is l perpendicular to PP′ and RR′? R N P′

(d) Is PP′ = 2RR′? R′

(e) Is ∆ PQR ≅ ∆ P′R′Q′?

(f) Is ∆ PQR ≅ ∆ P′Q′R′? Q′

Some NCERT Textbook Questions

1. Copy the figures with punched holes and find the axes of symmetry for the following:

(a) (b) (c) (d)

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