Geometry
# Congruent and Similar Triangles

In the above diagram, \(x=21,\) \(y=14,\) \(\alpha={35}^\circ,\) and \(\beta={75}^\circ.\) Which condition would mean that the two triangles are similar?

**Note:** The above diagram is not drawn to scale.

Did you know you can approximate the diameter of the moon with a coin \((\)of diameter \(d)\) placed a distance \(r\) in front of your eye?

If the distance between the moon and your eye is \(R,\) what is the diameter of the moon?

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