The top of an offshore oil rig has an elevation of 199.2 meters and its base has an elevation of -9.6 meters. an observation deck is located at an elevation equal to of the total height of the oil rig. a helipad is located 22.8 meters above the observation deck. what is the elevation of the helipad?

Do u just plot the numbers on the graph like (1,

In the figure below, segment ac is congruent to segment ab: triangle abc with a segment joining vertex a to point d on side bc. side ab is congruent to side ac which statement is used to prove that angle abd is congruent to angle acd? segment ad bisects angle cab. triangle acd is similar to triangle abd. segment ad is congruent to segment ac. angle cab is congruent to angle cba.

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)