Greece was the birthplace of democracy
You need to restate your question. It's incoherent.
This yard is a rectangle of dimensions 20 ft x 30 ft. Meaning you have 2 sides of 20 feet and 2 sides of 30 feet. This would be 100 feet, but you are using 30 feet of a building instead of fence on one side. Therefore it is 100 feet - 30 feet. The final answer is 70 feet total.
because they both have the same things like the right to walk down the street or we have the right to speak out loud
The perspective of Africans changed in a significant way after fighting in WWII. For years, Africans had been unhappy with the treatment they received from white settlers. As they fought side by side with these "colonial overlords" in the Second World War, that discontent grew. During the war, they were exposed to many new influences and ideas, which led them to see that the white man could be taken down if they attempted to do so. This new perspective led to African empowerment and determination.