1. Unit 1LINESby Maria AdroverCEIP S'ALGAR. PORTOCOLOM.Geometry 4th_Unit 1_Lines

2. STRAIGHT LINEA straight line is a line that does not curve.A line extends in both directions without end (infinitely)Geometry 4th_Unit 1_Lines 3. RAY and HALF-LINEA ray is a line with a start but without an end.A line divided into two parts, each part is a half-line.The point that divides a line is called origin.Geometry 4th_Unit 1_Lines 4. SEGMENT LINEA line segment is the part of a line connectingtwo points.It has definite end points.Geometry 4th_Unit 1_Lines 5. PARALLEL LINESTwo lines on a plane that never meet. They are alwaysthe same distance apart 6. SECANT and PERPENDICULAR LINESTwo lines are secant if they meet in a point and form4 angles.If the lines make 4 right angles (90), then they areperpendiculars. 7. SECANT and PERPENDICULAR LINESTwo lines are secant if they meet in a point and form4 angles.If the lines make 4 right angles (90), then they areperpendiculars.