Tom bought 8 new baseball trading cards to add to his collection. The next day his dog ate half of his collection. There are now only 32 cards left. How many cards did Tom start with ?

Which of the following statements is true? a. a 10o angle is congruent to a 10o angle. b. a triangle can only have two congruent angles. c. congruent angles always add up to 90o. d. a congruent angle is always 90o.