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◊ 30 traditional K'NEX challenges
◊ 58 Real-life K'NEX challenges
- Activity 2 - K'NEX connectors
- Activity 3 - Five sizes of K'NEX triangle
- Activity 4 - Learning about triangles
- Activity 30 - Counting rods and connectors
- Activity 38 - Costing with K'NEX
- Activity 44 - Estimating with K'NEX
- Activity 52 - Ten-pin skittles
- Activity 67 - Weighing scales
- Activity 74 - Speed investigation
- Activity 82 - Organisation chart
- Activity 90 - Four-sided spinner
- Activity 95 - Coding machine
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Activity 4 - Learning about triangles
The triangles in activity 3 are called right-angled triangles, because they all include one "right-angle". A right-angle is 90°. Both the other angles in each K’NEX triangle above are 45°.
As you can see, the three angles (90°, 45° and 45°) add up to 180°, and indeed the three angles of any triangle always add up to 180°.
As well as making right-angled triangles using the standard K’NEX connectors, you can also use hinges to make triangles. Try the one below.
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