What is the minimum number of cards that must be drawn from an ordinary deck of cards to guarantee that you have been dealt at least three of at least one value (e. g., three kings, or three 9s, or three aces, etc.)

72 the length of a side of a triangle is 36. a line parallel to that side divides the triangle into two parts of equal area. find the length of the segment determined by the points of intersection between the line and the other two sides of the triangle.