Pahelp po *^____^*

1. a quadrilatiral has angles that measure xº, ( x + 20)º, ( x + 40)º, and ( x + 60)º find the smallest angle.

2. Mr. Esperee is planning to build a gazibo whose base is a regular dodecagon. at what angle should he cut the lumber to frame the base?

3. three angles of a pentagon is 125º, 130º, and 135º. find the larger of the two angles if they are in a ratio of 2:3