RIC-1069 Maths terms and tables
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Angles <strong>and</strong> parallels<br />
Right angle<br />
(90°)<br />
Acute angle<br />
(less than 90°)<br />
Obtuse angle<br />
(greater than 90° <strong>and</strong> less than 180°)<br />
Straight angle<br />
(180°)<br />
Reflex angle<br />
(greater than 180° <strong>and</strong> less than 360°)<br />
One rotation<br />
(360°)<br />
a<br />
c<br />
d<br />
b<br />
a e<br />
c g<br />
b f<br />
d h<br />
Vertically opposite angles<br />
Angle pairs a & b, <strong>and</strong> c & d are<br />
vertically opposite <strong>and</strong> congruent.<br />
Corresponding angles<br />
Pairs a & b, c & d, e & f, g & h are<br />
corresponding, congruent angles.<br />
a<br />
b d<br />
c<br />
Co-interior angles<br />
Angle pairs a & b, <strong>and</strong> c & d are<br />
co-interior <strong>and</strong> are supplementary;<br />
i.e. each pair adds up to 180°.<br />
d b<br />
h f<br />
e g<br />
a c<br />
Alternate angles<br />
Pairs a & b, c & d, e & f, g & h are<br />
alternate, congruent angles.<br />
86 <strong>Maths</strong> <strong>terms</strong> <strong>and</strong> <strong>tables</strong> R.I.C. Publications ® www.ricpublications.com.au
Change language