A playground slide is 12 feet long. The distance the base of the slide and the ladder is 6 feet. How do i solve this and what is the answer?

Can you please help me for this exercise and write the steps for me and circle the answer so that I can understand. That I can solve other exercises like this one.

I need to solve for x. The polygons are similar

A 1.4 m tall child is standing next to a flagpole. The child's shadow is 1.2 m long. At the same time, the shadow of the flagpole is 7.5 m. long. How tall is the flagpole?

how to solve

You want to put edging around your above ground rectangular pool. The dimensions of the pool are 22 ft by 27 ft. How many feet of edging do you need to purchase to surround the pool? Your answer should be number only.

John and Mike are trying to determine the length of the staircase they will need for a deck that is 12 feet high. They want to start the stairs 21 feet from the deck. How long will the stairs be in length? Round to the nearest thousandth if necessary

The answer is 12,000. Can you please explain how is that the answer? Thanks.

Ms. Reece's 5th grade class wants to figure out how tall the school flagpole is. On a sunny day, the class goes outside and measures that the shadow of the flagpole is about 23 feet, 3 inches long. At the same time, Juan's shadow is 5 feet, 2 inches long. Juan is 4 feet, 6 inches tall. Determine the (approximate) height of the flagpole using a method that the children in Ms. Reece's class could find plausible. Express your answer in feet and inches. The children know about multiplication and division, but they don't know any more advanced mathematics, such as setting up proportions, so you can't use proportions to do this.