Grade 8 Geometry: Straight Lines

Front

Line Segment

Back

Part of a line with two endpoints

Front

Ray

Back

Line with one endpoint, extends infinitely

Front

Parallel Lines

Back

Lines that never intersect

Front

Perpendicular Lines

Back

Lines that intersect at 90°

Front

Angle Bisector

Back

Line dividing angle into two equal parts

Front

Collinear Points

Back

Points on the same line

Front

Intersecting Lines

Back

Lines that cross each other

Front

Transversal

Back

Line that intersects two or more lines

Front

Acute Angle

Back

Angle less than 90°

Front

Obtuse Angle

Back

Angle more than 90° but less than 180°