property owner thinks he can remove it himself, but is concerned before attempting to cut it down. At 3 P. M. he measures the that it will fall on his greenhouse. He takes several measurements shadow of the tree and finds it to be 15 feet long. He also else must he know to be able to determine the height of the tree? ( 11) the height of the greenhouse the width of the greenhouse (3) the diameter of the tree (4) the speed and direction of the wind (5) the length of the shadow of the 4-foot fencepost​