Misc: In 1632 Sir Christopher---------- , England, astronomer/great architect, born. ?

Questions

A triangle with two equal sides is called ?

An angle greater than 180 degrees and less than 360 degrees is a(n) ?

An angle greater than 90 degrees and less than 180 degrees is said to be ?

An integer that is greater than 1 and is divisible only by itself and 1 is known as a(n) ?

Arc, radius, and sector are parts of a(n) ?