Angles Parallel Lines Demonstration This resource provides animated

Angles – Parallel Lines – Demonstration This resource provides animated demonstrations of the mathematical method. Check animations and delete slides not needed for your class.

Parallel Lines Straight lines are parallel if they are always the same distance apart (equidistant). If they are the same distance apart, the will never meet. : ( 4 cm

Parallel Lines Which shapes include parallel lines? Parallel, but not straight. What shapes in real life have parallel lines?

Parallel Lines A line continues forever. A line segment is one section of a line. Parallel Symbol Line Segment Line

Angles Around Parallel Lines A transversal crosses at least two lines. What can we deduce about the angles a to h? a c e g b d f h

Angles Around Parallel Lines A transversal crosses at least two lines. What can we deduce about the angles a to h? Corresponding Angles a=e are b=f equal c=g d=h a c e g b d f h

Angles Around Parallel Lines A transversal crosses at least two lines. What can we deduce about the angles a to h? Corresponding Angles are equal a c Alternate Angles c=f are d=e equal e g b d f h

Angles Around Parallel Lines A transversal crosses at least two lines. What can we deduce about the angles a to h? Corresponding Angles are equal a c Alternate Angles are equal Co-Interior Angles c + e = 180° d + f = 180° e g b d f h e + f = 180° f=c

Angles Around Parallel Lines Corresponding Angles are equal a c Alternate Angles are equal Co-Interior Angles = 180° e g b d f h

Angles Around Parallel Lines What is the connection between these angles? Corresponding Angles are equal 110° Alternate Angles are equal Co-Interior Angles = 180° a

Angles Around Parallel Lines What is the connection between these angles? Corresponding Angles are equal Alternate Angles are equal Co-Interior Angles = 180° 40° b

Angles Around Parallel Lines What is the connection between these angles? Corresponding Angles are equal Alternate Angles 130° are equal Co-Interior Angles c = 180°

Angles Around Parallel Lines What is the connection between these angles? Corresponding Angles are equal 50° Alternate Angles are equal Co-Interior Angles = 180° d

Angles Around Parallel Lines What is the connection between these angles? Corresponding Angles are equal Alternate Angles are equal Co-Interior Angles = 180° 100° e

Angles Around Parallel Lines What is the connection between these angles? Corresponding Angles are equal 110° Alternate Angles are equal Co-Interior Angles = 180° f

Angles Around Parallel Lines What is the connection between these angles? Corresponding Angles are equal 85° Alternate Angles are equal Co-Interior Angles = 180° f

Angles Around Parallel Lines What is the connection between these angles? Corresponding Angles are equal Alternate Angles are equal Co-Interior Angles = 180° 130° f

Angles Around Parallel Lines Find the size of each missing angle (a to g). For each question you must write down the rule you used. b = 80° co-interior Corresponding Angles are equal Alternate Angles a 45° b 100° c 110° c = 110° corresponding a = 45° alternate are equal 42° Co-Interior Angles d = 180° d = 138° co-interior 115° e 75° = 115° co-interior & Youewill need to use two vertically opposite angle rules for this question.

Questions? Comments? Suggestions? …or have you found a mistake!? Any feedback would be appreciated . Please feel free to email: tom@goteachmaths. co. uk