What is the relationship between the number of vertices in each polygon and the number of isosceles triangles?
The image consists of three figures, first is of a regular square with diagonals intersecting each other, second is is of a regular pentagon whose vertices are joined to its centre and third is of a regular hexagon with diagonals intersecting each other.

A. The number of vertices is 1 more than the number of isosceles triangles.
B. The number of vertices is equal to the number of isosceles triangles.
C. The number of vertices is 1 less than the number of isosceles triangles.
D. The number of vertices is 2 less than the number of isosceles triangles.

Martha has a deck of cards. she has lost some of the cards, and now the deck only contains nine spades, eleven diamonds, eight clubs, and twelve hearts. martha predicts that whenever she draws a card from the deck without looking, she will draw a club one-fifth of the time. which activity would best allow martha to test her prediction? a. randomly draw a card from the box and see if it is a club. b. randomly draw a card. then, continue to draw another card until all eight clubs are drawn. c. randomly draw and replace a card 120 times. then, observe how close to 30 times a club is drawn. d. randomly draw and replace a card 100 times. then, observe how close to 20 times a club is drawn.