In the quadrilateral ABCD, the sides AB and CD are parallel and equal, AB = 6.5 cm, AC = 10 cm, BD = 5 cm.

In the quadrilateral ABCD, the sides AB and CD are parallel and equal, AB = 6.5 cm, AC = 10 cm, BD = 5 cm. Find the perimeter of the triangle COD, O is the intersection point of the diagonals

In a quadrangle, the diagonals bisect each other.
Therefore DO = 3
OC = 5
DC-given 6.5
P = DO + OC + DC
3 + 5 + 6.5 = 14.5
Answer: 14.5



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.