In this lesson, children explore missing angles in equilateral, right-angled and isosceles triangles. They explore that one angle in a right-angled triangle is always 90° and use this to find other missing angles. They explore that in equilateral triangles, all angles are equal, therefore each angle is 180° ÷ 3 = 60°. They explore that in an isosceles triangles, there are two equal angles. This lesson includes a teaching presentation accompanied by differentiated activities with a range of fluency, reasoning and problem-solving questions, as well as 3 sets of extra fluency questions.

National curriculum objectives

Compare and classify geometric shapes based on their properties and sizes and find unknown angles in any triangles, quadrilaterals, and regular polygons

Differentiation

There are three levels of differentiation in this pack: ‘working towards,’ ‘expected’ and ‘greater depth’.

Level of this Pack:
Age: 10-11
 England & Wales: Year 6
 Scotland: Primary 6
 Rep. Ireland: Fifth Class
 Australia: Grade 5
 USA: Grade 5

#summer block 1...