# Home » Compass & Straight Edge

## Centre of a Triangle

In this lesson we find the centre of a triangle. PowerPoint Lesson: Compass and Straight Edge – The Centre of a Triangle Compass and Straight Edge – The Centre of a Triangle (Thai version) Download Worksheet (PDF): Compass…

Read More »## Angles-Introductory Terms

In this video, Teacher Jon introduces the basic terms students need for the study of Angles. Video Lesson: Download Worksheet (PDF): ANGLES-Introductory Terms

Read More »## Easy Angle Problems

In this lesson, Teacher Jon provides some easy angle problems, for Lower Secondary Maths students, but a basic knowledge of the terms and symbols used in Angles is still required– (for instance, see my video on Angles –…

Read More »## The World’s Two Hardest Easy Geometry Problems

In this video, Teacher Jon sets out how to solve these two well known geometry problems using only isosceles, equilateral and congruent triangles. Video Lesson: Download Worksheet (PDF): World’s Two Hardest Easy Geometry Problems(Geometry-Angles)

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