TLF ID M025324
In this sequence of three lessons, students use geometric reasoning to establish relationships between angles in polygons and go on to make generalisations using algebraic expressions. Students explore and enumerate right angles in a series of rectilinear polygons and generalise their findings. They then explore the number of ways they can construct a rectilinear decagon, documenting and explaining their constructions. Finally, students consider a rectilinear polygon with a large number of sides and explore strategies for generalising the combinations, including programmatically. The lessons are outlined in detail including curriculum links, vocabulary, sample answers, discussion points and student resources. This sequence is part of the reSolve: Maths by Inquiry program.