Missing Angles Our learning objectives today •To calculate missing angles on a straight line, around a point and in a triangle. •To use a protractor.

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Missing
Angles
Our learning objectives today
•To calculate missing angles on a straight
line, around a point and in a triangle.
•To use a protractor to draw and measure
acute and obtuse angles to the nearest
degree.
What do you need to know?
Angles in a triangle add up to.................
180°
Angles on a straight line add up to.......
180°
Angles around a point add up to.............
360°
Calculate the missing
reflex angle
313°
47°
Calculate the missing
straight line angle
69°
111°
Calculate the missing
reflex angle
234°
126°
Calculate the missing
triangle angle
89°
37°
54°
Calculate the missing
straight line angle
103°
35°
42°
Missing
Angles
Our learning objectives today
•To calculate missing angles on a straight
line, around a point and in a triangle.
•To use a protractor to draw and measure
acute and obtuse angles to the nearest
degree.

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