Are useful when you want to show the ratio of different parts to the whole.

How did the romanov dynasty increase russia's power? need many details, you!

Why is it economically necessary for the east germans to build berlin wall

What policy did "jim crow" laws put in place? black codes integration segregation 2. the supreme court case that established the doctrine of "separate but equal" was dred scott v. sandford plessy v. ferguson brown v. board of education 3. the supreme court case that overturned the doctrine of "separate but equal" wasdred scott v. sandford plessy v. ferguson brown v. board of education