# Perpendicular Line

**Lesson Aims**Pupils will recognise perpendicular lines and draw perpendicular lines.

**Name of Model**The swimming fish.

**The Lesson Structure**The measuring tool,Composition and Decomposition of Shapes, Polygons 3,Perpendicular lines and sides of polygons.

**Lesson Content**In this lesson the pupils will investigate perpendicular and intersecting lines. At the conclusion of this lesson the final model will be a surprise while learning new concepts and revising previously learnt geometrical concepts.

**Prior knowledge**Angles,right angle,sides of a polygon.

**Materials**Two sheets of origami paper 15×15 cm,and two colored markers.