Page 77 - 01-Yr5_Front cover-ccp.indd

• Parabola patterns •••••
(]! Copy ond complete this table 1 2 3 ' 1 7 a !
~:I•I•l¥1fJ~ showing pairs of numbers that 9 ' 8 6 , 1 1
together make 10.
PAGE 72 [g] • Drow an acute angle. You can make this pattern of 3 parabolas
by numbering the sides clockwise
• Mork equally-spaced points on
each arm and number them, from each vertex and joining
1__..._1 , 2---2. and so on.
starting at the vertex. '
• Use a ruler to join points A
5
which add up to 10. 6 ,
9 ~9
The curve mode by the lines is called a parabola.
It is the path of a boll thrown in the air,
o jet of water, or a bullet from a gun.
@:J Drow another parabola using an obtuse angle and
a different number of points
E±] • Construct a square with 10 cm sides.
• Mark each side in centimetres and number as shown
• Decide how to make pattern A. Continue it, if you like, to make pattern B.

CHALLENGE
• Design your own pattern made from parabolas.
For example, you could design an 8-pointed star
on this frame.
Now try page 73.

1 2 3 4 5 6 7 8 q Practical: designing a parabola pattern with equilateral triangles.
q 8 7 6 5 4 3 2 1

Practical: constructing a parabola in an acute angle.

Practical: constructing a parabola in an obtuse angle.

Practical: constructing parabola patterns in squares.

Challenge
Practical: designing a pattern made from parabolas.