In a parallelogram opposite angels are always a) equal b) unequal c) complimentary d) supplemental

a) equal

Explanation:

in a parallelogram opposite angels are always equal.

could you use this to with a topic?

the key difference between a democracy and a republic lies in the limits placed on government by the law, which has implications for minority rights. both forms of government tend to use a representational system — i.e., citizens vote to elect politicians to represent their interests and form the government.