What is true regarding two adjacent arcs created by two intersecting diameters?

They always have equal measures.

The difference of their measures is 90°.

The sum of their measures is 180°.

Their measures cannot be equal.

Aquadrilateral has exactly one pair of parallel sides. which name best describes the figure?

The answer is 7.2 how would you put this as money

70 points ! pls 2. given the following two sets of data what is the union of the two sets and what is the intersection of the two sets. set a = {1, 2, 3, 4, 5, 6, 7, 8, 9} set b = {2, 4, 6, 8, 10, 12, 14} 3. given a regular deck of cards. describe a way of pulling cards that would create a dependent event and then one that would create an independent event. 4. what is the probability of drawing a red card and then drawing a spade without replacing the card that was drawn first?