1. The rope touches the top of the tree, then by similar triangles, the building must be
32 feet tall.
4. The perpendicular bisectors of the three sides of a right triangle intersect on the hypotenuse.
Since that's on the triangle, rather than inside or outside it, the answer is
II only.
A triangle could have sides of 6 cm, 10 cm, and 9 cm.
(In all the other answers, the two shorter sides add up to the length of the larger side or less than that length, so they can't form a triangle.)
If the lengths of two sides of a triangle are 9 and 15,
then the third side must be more than 15 - 9 = 6
and less than 9 + 15 = 24.
