Estimate Now measure the angle 150 Estimate Now
- Slides: 7
Estimate Now measure the angle? 150º
Estimate Now measure the angle? 215º
Constructing triangles Aim: To construct triangles using a protractor. 60º
Draw a triangle with one side 6 cm and angles at each end of 30º and 70º. Mark 70º Mark 30º 6 cm
Draw a triangle with a side 12 cm and side 9 cm with an angle of 75º between them. Mark 75º 12 cm
Three ways to construct triangles. §When constructing triangle we need a combination of angles of lengths. § We can construct triangles with a compass if we have the lengths of the 3 sides (S S S). § We can construct triangle using a protractor if we have the length of 1 side and the measurement of 2 angles ( A S A ). § We can construct triangle using a protractor if we have the length of 2 sides and the measurement of 1 angles ( S A S ). Note: To construct triangles, we need to know the length of at least 1 side plus 2 other pieces of information.
Task and Homework Construct the following triangle: S S S Triangles A S A Triangles 5 cm 7 cm 9 cm 40º 7 cm 50º 4 cm 6 cm 45º 6 cm 10 cm 8 cm 7 cm 20º 8 cm 100º 6 cm 6 cm 8 cm 10 cm 60º 8 cm 60º 8 cm 7 cm 110º 7 cm 45º 6 cm
