The angle of elevation of the top of a tower from a point 20 m away from its base is 45 °. What is the height of the tower?

The angle of elevation of the top of a tower from a point 20 m away from its base is 45 °. What is the height of the tower?

Explanation
Using the tan formula:
tan(45°) = height / distance
Since tan 45° = 1, we get:
1 = height / 20 → height = 20m.