Height and Distance - General Questions

From a point on the ground 45 m away from the foot of a pole, the angle of elevation of the top is 30°. What is the height of the pole?

The angle of elevation of the sun is 45°. What is the length of the shadow of a 55 m tall tree?

From a point on the ground 9 m away from the foot of a pole, the angle of elevation of the top is 30°. What is the height of the pole?

The angle of elevation of the sun is 45°. What is the length of the shadow of a 40 m tall tree?

A ladder leaning against a wall makes an angle of 60° with the ground. The foot of the ladder is 7 m from the wall. What is the length of the ladder?