I. Lines
A --B AB is a solid linÄ™.
A..........B AB is a broken linc.
A B AB is a dotted linÄ™.
A WW^B AB is a wavy linÄ™.
A--B AB is a horizontal linÄ™.
A
AB is a vertical linÄ™. B
AB is a diagonal linÄ™.
B
A-
B
C
D
E
F AB & CD arc straight lines, EF is a curved linc.
A
AB is perpcndicular to CD.
A-B AB is parallel to CD.
C-D
AB and CD are intersecting lines. Thcy intersect at X.
II. Angles
ABC is a thirty dcgrec anglc.
ABC is an angle of thirty dcgrccs.
AB is at an angle of thirty dcgrccs to BC.
An angle of 90° is a right angle.
An angle < 90° is an acute angle.
An angle >90° but <180$ is an obtusc angle.
An angle >180° is callcd a reflcx angle or an cxternal anglc.