Find the perimeter of the polygon if ZB = ZD.
6.5 cm
B
D
7.5 cm
8.5 cm
С
P = [?] cm
Enter

In a certain pentagon, the interior angles are a,b,c,d,e where a,b,c,d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

The transitive property of equality states that: o if a = b, then bra o if a = b, then ac = bc o if a = b and b= c, then a = if a = b and c= c, then a + b = b + c