I can try to help out, The Distance between A and H is 12 feet same with H and B So My answer for a. The Lighthouse is 24 Feet tall, And for b. if you look at K and G's Distance from the Lighthouse Its the same distance in which kelly is looking at the lighthouse, which is 26 Ft. for C. Has me abit puzzled, Math Necessarily isn't my Strong suit so hopefully someone will answer C for you