Question

Septagon
ple, look at the first one left line goes
straight up, while the right one is slanted to the left.
Look at the other figures and complete this table:
Octagon
Figure
Slanted
Upright
1
Left line
Right line
Left line, right line
2
3
4.
Left line, right line
5
6
go
7​

Answer 1

Answer:

Unit 15 Section 3 : Symmetry

In this section we revise the symmetry of objects and examine the symmetry of regular polygons.

There are two types of symmetry: reflective symmetry and rotational symmetry.

Reflective Symmetry

An object has reflective symmetry if it can be reflected in a particular line and looks the same as the original.

The line the object is reflected across is called a line of symmetry or a mirror line.

Look for lines of symmetry in the two shapes below:

In (a) there are two lines of symmetry, one horizontal and one vertical.

In (b) there are also two lines of symmetry, both diagonal.

Here are the shapes with the lines of symmetry drawn on:

Rotational Symmetry

An object has rotational symmetry if it looks the same as it did originally when rotated