Okay, so there are two people who are trying to find out whether or not there were 9 stones in this arch. Trey thinks that the need to recalculate the arch based on the angles of their stone, while Serena believes there were 9 stones in the original arch.

each acute angle of their stone measures at 84 degrees with congruent legs.

i need help finding the sun of this drawing. please help

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations