10453013’1140854581464b37575489684129112 o

10453013’1140854581464b37575489684129112 o



Geometry

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.



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