You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>Polygons</strong><br />
C<br />
a<br />
c<br />
b<br />
d<br />
Susanne must find lids for these<br />
cartons. Use Student Activity<br />
Sheet 5 to cut out the lids Suzanne<br />
selected.<br />
6. Reflect Compare the four<br />
lids. How are the polygons the<br />
same? How are they different?<br />
The lid for carton D is a special type<br />
of polygon; it is a regular polygon.<br />
7. What do you think makes<br />
polygon D “regular”?<br />
8. In how many different ways<br />
can Suzanne place the lid on<br />
each of the cartons A to D?<br />
Figure A<br />
Four Equal Angles<br />
Figure B<br />
9. The two quadrilaterals at the<br />
left are not regular polygons.<br />
a. What is irregular (not<br />
regular) about Figure A?<br />
b. What is irregular about<br />
Figure B?<br />
c. In how many ways can<br />
Figure A be folded in half<br />
so that it fits onto itself?<br />
Figure B?<br />
Four Equal Sides<br />
10. a. Draw a quadrilateral that can be folded in half in four<br />
different ways.<br />
b. What is the name of this quadrilateral?<br />
c. Is the quadrilateral you drew in part a regular?<br />
Why or why not?<br />
Section C: <strong>Polygons</strong> 25
Change language