Lesson Three – Reflex Angles
This maths teaching pack for Key Stage Two gets the children to practise using the measured values of reflex angles to calculate the matching sets of angles that can be found in different sized isosceles triangles.
The class can explain and model how to measure a reflex angle on a shape using a protractor and then complete number calculations to find each of the internal angles.
Download this teaching pack including a lesson plan, classroom activities and an interactive presentation to practise using the measured values of reflex angles to calculate the matching sets of angles that can be found in different sized isosceles triangles
Activities in this teaching pack include a differentiated set of worksheets to model and record how to work with the measured values of reflex angles using a protractor to calculate the other sets of angles that can be found in an isosceles triangle.
The interactive presentation gets the children to explore how to use the values of reflex angles to calculate the sets of angles in different sized isosceles triangles.
This lesson is part of a maths scheme of work to get the children to record measurements and complete calculations to identify the value and type of angles found on a range of different 2D shapes. There are teaching activities for shared learning, differentiated worksheets to support independent learning and interactive presentations to introduce concepts and key skills.
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