Hi Can you solve this please?

The spotter on the ground is standing beneath the safety net. what is his distance from the base of the platform, to the nearest meter? 3 meters, 2 meters, 4 meters, 1 meter?

Give all possible names for the line shown.calculation tip: lines can be written with either point first.

Cd is the perpendicular bisector of both xy and st, and cy=20. find xy.