Answer:
AFH, BFG, CDG, EFG
Step-by-step explanation:
Please check the point position with your question, if there is any difference... the way to find out a right angle triangle is just like the attached picture.
3.) 2 × 0.5 = 1
4.) -2 × -0.5 = 1
We can employ a simple repeated decimal trick:
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Alternatively, we can compute the partial sum of the series.
As , the second term vanishes and we're left with . Notice that this is really just a more formal version of the earlier trick.