1. a pentagon has sides 18 cm, 19 cm, and 20 cm if the other two sides are congruent and the perimenter of the pentagon is 97cm what are the measures for the other two sides?
2. the measure of the angles of quadrilateral LEAF are as it follow: m∠ = 62, m∠e = 120, m∠a = 98. what is the measure of m∠f?
3. find the number of sides of a regular polygon whose exterior angles measure twice the size its interior.
4. find the angle of the pentagon are in a ratio 1:2:3:4:5. find the largest angle.