Angle CDE is 45 degrees and DE is 50 meters. How tall is the castle?

The castle is 50 meters tall.

Step-by-step explanation:

If a right triangle has a 45° angle, that means the legs of that triangle - the two sides that aren't the hypotenuse - will be equivalent. Since DE and CE are the legs in this right triangle, and DE equals 50 meters, that means CE will also equal 50 meters, which makes the height of the castle 50 meters tall.

answer: a.   one is a factor of every whole number since every number is divisible by itself.