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.