Slide 2:
Point A indicates a position in space. Point .A
Slide 3:
The line EF is infinite in length Line E F
Slide 4:
The interval PQ is part of a line. P Q Interval
Slide 5:
EF is a vertical line. Horizontal and vertical lines C D E F CD is a horizontal line.
Slide 6:
Right angle An angle of 90° between 2 lines. Right angle symbol
Slide 7:
Perpendicular lines Perpendicular lines are at right angles (90°) to each other.
This is written as CD EF. C D E F
Slide 8:
Straight angle A straight angle (or half a revolution) measures 180°.
Slide 9:
Complete revolution A complete revolution measures 360°.