1. Angles and parallel lines a° b° Corresponding angles for parallel lines are equal m n t m and n are parallel lines, t is a Transversal A transversal is a line that cuts other lines For one set of parallel lines and one transversal there are four sets of corresponding angles.

2. Angles and parallel lines a° b° Corresponding angles for parallel lines are equal. m n t m and n are parallel lines, t is a Transversal A transversal is a line that cuts other lines 65° G° G° = 65°, Reason Corresponding angles, parallel lines are equal See Alpha text book for further notes Page 266 Ex 18.4 Copy diagrams for each of the questions 1 to 6 and complete. Please use a ruler and pencil. Mark all work from answers. Ex 18.5 Copy diagrams and complete numbers 1, 3, 5, 7, 9 & 10 Note the position of the named angles. Can you see why they are the same size? Draw a set of parallel lines Add a transversal Measure an angle Measure the corresponding angle. Are the corresponding angles equal?

3. Angles and parallel lines a° b° Alternate angles for parallel lines are equal m n t m and n are parallel lines, t is a Transversal A transversal is a line that cuts other lines For one set of parallel lines and one transversal there are two sets of Alternate angles.

4. Angles and parallel lines a° b° Alternate angles for parallel lines are equal. m n t m and n are parallel lines, t is a Transversal A transversal is a line that cuts other lines 125° G° G° = 125°, Reason Alternate angles, parallel lines are equal See Alpha text book for further notes Page 264 Ex 18.2 Copy diagrams for each of the questions 1 to 8 and complete. Please use a ruler and pencil. Mark all work from answers. Ex 18.3 Copy diagrams and complete numbers 1, 3, 5, 7, 9 & 11 Note the position of the named angles. Can you see why they are the same size? Draw a set of parallel lines Add a transversal Measure an angle Measure the Alternate angle. Are the Alternate angles equal?

5. Angles and parallel lines a° b° a° Co-Interior angles for parallel lines are supplementary, a + b =180° m n t m and n are parallel lines, t is a Transversal A transversal is a line that cuts other lines 125° k° K° = 65°, Reason Co-interior angles, parallel lines are supplentaryl See Alpha text book for further notes Page 269 Ex 18.6 Copy diagrams for each of the questions 1 to 10 and complete. Please use a ruler and pencil. Note the position of the named angles. Draw a set of parallel lines Add a transversal Measure two co-interior angles Are they supplementary? Extension work: Mark all work from answers. Ex 18.7 Copy diagrams and complete numbers 1 to 21 complete for Homework.