Acourse for sled racing is being constructed so that there will be a 41-meter vertical drop over the 990-meter course, as shown in this diagram.
write a mathematical expression for the measure of angle θ
using an inverse trigonometric function.

Match the following reasons with the statements given to create the proof. 1. do = ob, ao = oc sas 2. doc = aob given 3. triangle cod congruent to triangle aob vertical angles are equal. 4. 1 = 2, ab = dc if two sides = and ||, then a parallelogram. 5. ab||dc if alternate interior angles =, then lines parallel. 6. abcd is a parallelogram cpcte