Area of Triangles

Area of Triangles
Area of Triangles
Area of Triangles
Area of Triangles

What's Included

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

Area of Triangles

By considering a right angled triangle as half a rectangle the students are guided through deriving the formula for any triangle.  The emphasis is placed on recognizing the perpendicular height for isosceles and scalene triangles with different orientations.
Differentiated Learning Objectives
  • All students should be able to calculate the area of a right-angled triangle as half of a rectangle.
  • Most students should be able to derive the formula for the area of a triangle and use it.
  • Some students should be able to calculate the area of a compound shape involving rectangles and triangles
View online lesson
Lesson Downloads
Download PowerPoint Download Notebook Download Flipchart Download WorksheetDownload Interactive Excel File
Scheme of Work Link
Perimeter and Area Foundation Area of 2D Shapes Higher
IMMEDIATE DOWNLOAD

You may also like...

Circumference of Circles

Students are taken through the process of discovering the relationship between the radius, diameter and circumfe...

Area of Circles Problems

The lesson is intended to consolidate applying the area of circle formula to solve complex problems.  To extend ...

Circumference of Circles Problems

This lesson consolidates calculating the circumference of a circle and the perimeter of circular shapes.  Studen...

Area of Circles

Students are guided though the derivation of the Area of a Circle formula by approximating a circle from its sec...

Mr Mathematics Blog

Rounding to a significant figure

When I teach rounding to a significant figure, I ask the class to discuss in pairs or small groups a definition for the word significant.  It is a word that all the students have heard before but not all are able to define. After 2 or 3 minutes of conversation I ask the students to […]

Calculating Instantaneous Rates of Change

When calculating instantaneous rates of change students need to  visualise the properties of the gradient for a straight line graph.   I use the starter activity to see if they can match four graphs with their corresponding equations. The only clue is the direction and steepness of the red lines in relation to the blue line […]

Converting Between Fractions, Decimals and Percentages

Fractions, decimals and percentages are ways of showing a proportion of something.  Any fraction can be written as a decimal, and any decimal can be written as a percentage.  In this blog I discuss how to use the place value table and equivalent fractions to illustrate how fractions, decimals and percentages are connected. You can […]