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# M2 Angle Watch

1. Could somebody explain why the angle between PQ and the horizontal (90-A) is the same as the angle theta in this diagram?

2. (Original post by Mattematics)
Could somebody explain why the angle between PQ and the horizontal (90-A) is the same as the angle theta in this diagram?

Two horizontals?

If Ybar-P is a tangent to the horizontal then 90-theta = A
3. (Original post by Mattematics)
Could somebody explain why the angle between PQ and the horizontal (90-A) is the same as the angle theta in this diagram?

It's from this question if I remember correctly,
Spoiler:
Show

This is my reasoning for it

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Updated: June 16, 2016
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