2021-22 LTPSS DAT S1-3

2.5 Project Assignment (3/4): Create / (Test)

• Learning Objectives:

  After this lesson, students can

  • name and use some common tools for assembling parts.
    
  • find the centre of a circle by mathematical and D&T methods respectively.
• 1. USE OF SOME COMMON TOOLS FOR ASSEMBLING PARTS

• Tools demonstrated in the lessons
  
  

  Use of glue, e.g. white glue (PVA)

  
  

  
  

  Soldering iron

  
  

  
  

  Hot glue gun
  

  
  

  
  

  Divider

• Reference: D&T Tools in LTPSS URL
• 2. FIND THE CENTRE OF A CIRCLE

• Method 1

  By the point of intersection of the perpendicular bisectors of 2 or 3 chords

  • https://www.geogebra.org/m/qshbbe5s

  
  
  

  Method 2 

  By 2 right angled triangles

  • https://www.geogebra.org/m/zhn6b6cd

  
  
  

  Method 3

  By the angle bisectors of the tangents from external points

  • https://www.geogebra.org/m/ksnxrgqf

• 2. HOMEWORK

• HW2.5.1 Tools Cuestionario

  Restringido No disponible hasta que cualquiera de:

  • se pertenezca al grupo 2A/2R GROUP 2
  • se pertenezca al grupo 2S/2M GROUP 2
  • se pertenezca al grupo 2T/2Y GROUP 2
  • se pertenezca al grupo 2A/2R GROUP 1
  • se pertenezca al grupo 2S/2M GROUP 1
  • se pertenezca al grupo 2T/2Y GROUP 1