Constructing Triangles using Compasses and Protractors

Constructing Triangles using Compasses and Protractors
Constructing Triangles using Compasses and Protractors
Constructing Triangles using Compasses and Protractors
Constructing Triangles using Compasses and Protractors

What's Included

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

Constructing Triangles using Compasses and Protractors

Students learn how about constructing triangles using compasses and protractors using SSS, SAS and ASA.  As learning progresses students are challenged to measure angles and lines to scale and construct quadrilaterals.The start of the lesson recaps symmetry by asking students to identify which shape can not be quarter of a square.  The plenary challenges students to construct an arrowhead using two congruent triangles.
Differentiated Learning Objectives
  • All students should be able to construct a triangle using SSS.
  • Most students should be able to construct a triangle using SSS and SAS,
  • Some students should be able to construct a triangle using SSS, SAS and ASA.
View online lesson
Lesson Downloads
Download PowerPoint Download Notebook Download Flipchart Download Worksheet
Scheme of Work Link
Constructions and Scale Drawing 
IMMEDIATE DOWNLOAD

Mr Mathematics Blog

Showing Progress during a Mathematics Lesson

Demonstrating student progression during a mathematics lesson is about understanding the learning objective and breaking that down into explicit success criteria. Using Success Criteria Take, for example, a lesson on calculating the area of compound rectilinear shapes. The intended learning objective was written on the main whiteboard. Success criteria were used to break down the individual […]

Plotting and Interpreting Conversion Graphs

Plotting and interpreting conversion graphs requires linking together several mathematical techniques.  Recent U.K. examiner reports indicate there are several common misconceptions when plotting and interpreting conversion graphs.  These include: drawing non-linear scales on the x or y axis, using the incorrect units when converting between imperial and metric measurements, taking inaccurate readings from either axis not […]

Calculating the Volume of a Pyramid

When calculating the volume of a pyramid we can substitute the values of the length, width and perpendicular height into the formula V = 1/3 lwh.  In my experience this is often provided for the students with little explanation as to why a volume of a pyramid is exactly one third the volume of a […]