B5 Solving Triangles

Student Activities:
  1. The Sine Rule, Cosine Rule and Area of Triangle Worked examples with a Test (BBC Bitesize)

 

Teaching Resources:
  1. The Law of Sines A dynamic diagram proving the Sine Formula (www.ies.jp)
  2. The Sine Rule. Fully interactive triangle with side and angle measures and ratio calculations given in real-time. Angles and lengths may be adjusted. (Vienna University)
  3. Constructing Triangles This activity will help stimulate discussion on what minimum information is required to determine a unique triangle eg 3 sides? 2 sides and the included angle? 2 angles and the included side? (Utah State Univ, NLVM)
  4. Congruent Triangles Applets for exploring SSS, ASA, SAS, AAS, SSA and AAA JavaSketchpad (created by Mr. W.K. Cheng.)
  5. Cosine Rule Proof An interactive applet... experiment with a right angle for a2=b2+c2 then see where -2bccosA comes from! (ies.co.jp)
  6. Congruence Theorems Build up triangles using segment lengths and/or angles. An excellent exploration tool. Useful for creating examples to solve (illuminations.nctm.org)

 

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