Page 6 - 01-Yr5_Front cover-ccp.indd

•••••••
1 O cm circular
• Measuring angles • • protractor
~=1•Mi1"10~
Check that this decoration has been opened
up to form an acute angle of 45 degrees (45"}-
PAGE 7

Your teacher will show
you how to position your
protractor to measure angles.
[:O Write whether each decoration forms an acute, obtuse or reflex angle.
13] Measure in degrees haw far each decoration hos been opened up.

• Draw some portly-opened decorations.
• By estimating only, write haw far you
think they have been opened to the
nearest 10°.
• Chee'< by measuring.
a

Challenge
Open: draw partly-opened decorations and estimate how far they have
c obtuse d acute e reflex been opened to the nearest 10°.
h acute reflex reflex

1r minus 2°.
c 122° d 30° e 200°
h 67° 340° 270°