How many square feet of outdoor carpet will we need for this hole plz now

Which best explains why this triangle is or is not a right triangle ?

When a 757 passenger jet begins its descent to the ronald reagan national airport in washington, d.c., it is 3900 feet from the ground. its angle of descent is 6 degrees. how far must the plane fly to reach the run way? a. 37,106 ft b. 37,310.4 ft c. 23,456.6 ft d 2,492.7 ft

Given: ab ≅ bc and ao ≅ oc ok − angle bisector of ∠boc find: m∠aok