Page 381 - Math Smart - 7

Q Mark point 0 as shown as the centre of rotation. Q Mark point 0 as shown as the centre of rotation.
Place your compass point on point O. Place your compass point on point O.
Q Then, rotate the L-shape through half a turn Q Then, rotate the L-shape 90° clockwise.
(180°), clockwise. 0 Paste the rotated L-shape on the graph paper.
0 Paste the rotated L-shape on the graph paper. 0 Draw arrows to show the rotation. Label the
0 Draw arrows to show the rotation. Label the object (B) and the image (B').
object (A) and the image (A').

Look at the two rotations you have completed. Complete the statements and answer the questions.

0 rotation A, the centre of rotation is the object.
In
What do you notice about this point of the object after the rotation?
In
0 rotation B, the centre of rotation is from the object.
What do you notice about the points on object B after the rotation?

Check My

Understanding

0 Draw each figure below on a piece of graph paper. Draw the Image after each rotation.

_ \ A rtrtA _ ^ ! L A L%.\ AAO J"l A c) 180° about point C
ll
1 QH®
a) 180° about point A b) 90° anti-clockwise
about point B

B
A
■ y
S:
■■■i

0 Draw each figure below on graph paper. Rotate each given figure about point X. Draw the image,
a) 180° b) 90° anti-clockwise c) 90° clockwise

r
]
X x' ■
■

y