Reward Points
You earn points by engaging in sessions or answering questions. These points will give you a discount next time you pay for a class.
Lesson Plan: Parallel Lines and Transversals: Proportional Parts Mathematics • First Year of Secondary School
This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to use parallelism of lines to find a missing length of a line segment in a transversal line cut by parallel lines.
Objectives
Students will be able to
- understand how to apply the basic proportionality theorem (Thales’s theorem) to find a missing length of a line segment in a transverse line cut by parallel lines
- including problems involving algebraic variables as side lengths,
- including problems that use the properties of polygons,
- understand that if the lengths of the segments of one transversal are equal, then the lengths of the segments of any other transversal are also equal (Thales’s special theorem).
Prerequisites
Students should already be familiar with
- similarity,
- solving multistep equations.
Exclusions
Students will not cover
- trigonometry,
- the sine and cosine rule,
- parallel lines in a triangle.
