Calculate (a).z bar (b)z+z (c)z-z in each of the following z=1+i/1-i

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

If the perimeter of the square equals the perimeter of the regular pentagon. each side of a pentagon is 16cm long. how long is each side of the square?