5: Equi T & Coord Geom

A few more words about the EQUILATERAL TRIANGLE

1. All sides are equal, say, a

2. So, it is an Isosceles triangle thrice over i.e. when you turn it on its sides and there are three sides, each time you will end up with an isosceles triangle. 

3. When you drop a perpendicular from a vertex, it bisects the opposite side

4. the vertical drop i.e. the height of the triangle is aSin60 which is also equal to aCos30 

Once you understand the above simple ideas well, you can immediately write down the coordinates in the following diagrams. They have been done for you. Try to make up your own questions and find the coordinates. Have fun. 
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