# Construction of Triangles(SAS)- Activity 3a

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### Objectives

### Estimated Time

### Prerequisites/Instructions, prior preparations, if any

### Materials/ Resources needed

Construction of triangle with 2 sides and an angle SSA - conceptual error .ggb

### Process (How to do the activity)

- Draw a triangle with following measures - AB = 8 cms, ∡CAB = 40, BC = 6 cms (BC as the base)

‘Play’ the construction protocol navigator to understand the construction, after students have constructed on their own

- What kind of triangle is it?
- What kind of triangle is it - by sides?
- What kind of triangle is it - by angles?

- The circle drawn from point B, intersect RAY AC in a second point ‘E’.Will Triangle ABE fulfil the requirements of the construction? What can you infer from this construction specifications.

- What kind of triangle is it?

(Hint – if a set of specifications can allow us to draw more than one triangle, then it is not a unique specification).

The specification in this example is ASS (Angle -side – side) and not SAS (Side – angle - side)