Workplace & Apprenticeship 10 Outcome 10.09 Lesson #1.

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Workplace & Apprenticeship 10 Outcome Lesson #1

Angles and Lines Brainstorm some terminology related to angles and lines. Discuss the following images in terms of the angles and lines present.

Gable roof

Hip Roof

Pyramid Roof

Mansard roof

Salt Box roof

Flat Roof/ Shed Roof

Gambrel Roof

Common Angles Draw the following common angles. What methods/tools can be used to construct the angles? 22.5° 30° 45° 60° 90° 180° 360°

Referents Brainstorm referents for the common angles 22.5° 30° 45° 60° 90° 180° 360° Use referents to identify angle measures found in common roof designs.

Lines and Angles Using a straight edge, draw 2 lines (not necessarily parallel) and a transversal to identify and remember – Supplementary angles – two angles that add up to 180° – Complementary angles – two angles that add up to 90° – Adjacent angles – two angles that share a common vertex and a common arm – Vertically opposite angle - are the angles opposite each other when two lines cross

Identifying Lines and Angles Identify examples of supplementary, complementary, adjacent and vertically opposite angles found in common roof designs.