# Gradient of Perpendicular Lines

#### What's Included

• Smart Notebooks Presentation
• Activ Inspire Flipchart
• Lesson Plan
• Microsoft PowerPoint Presentation
• Differentiated Worksheet

# Gradient of Perpendicular Lines

The start of the lesson is used to recap calculating the equation of straight line graphs.  The development phase teaches students how to calculate the gradient of perpendicular functions.  As learning progress they are challenged to derive the equation of perpendicular graphs.
##### Differentiated Learning Objectives
• All students should be able to calculate the gradient of perpendicular lines.
• Most students should be able to calculate the equation of a perpendicular line.
• Some students should be able to calculate the equation of lines in the form ax + by + c = 0.
##### Related Blogs
Extending transformations beyond shapes on a grid
##### Scheme of Work Link

Linear Graphs - Higher

### Mr Mathematics Blog

#### How to Draw a Venn Diagram to Calculate Probabilities

There are three common ways to organise data that fall into multiple sets: two-way tables, frequency diagrams and Venn diagrams.  Having blogged about frequency diagrams before I thought I would write about how to draw a Venn Diagram to calculate probabilities. Recapping Two-Way Tables This activity works well to review two-way tables from the previous […]

#### Calculations with Percentages

Students learn how to find a percentage of an amount using calculator and non-calculator methods.  As learning progresses they use decimal multipliers to find a percentage change and calculate a simple interest in financial mathematics. This topic follows on from Fractions, Decimals and Percentages and takes place in Year 8 Term 5. Calculations with Percentages […]

#### Proving Geometrical Relationships using Algebra

Back in May 2017 maths teachers around the country eagerly awaited the first exam for the new GCSE Mathematics syllabus.  Proving geometrical relationships using algebra featured at grade 9.  In Paper 1 of Edexcel’s test paper the last question of the higher tier looked like this. Edexcel wrote about student’s performance on this question in […]