workplace & apprenticeship 10
DESCRIPTION
Workplace & Apprenticeship 10. Outcome 10.09 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. - PowerPoint PPT PresentationTRANSCRIPT
Workplace & Apprenticeship 10
Outcome 10.09Lesson #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.