The McGraw Hill 6th grade book series of games.
Instructions:
Find three coins of different sizes (e.g. quarter, nickle, penny). Flip each and record the head/tail value. Look up the angle degree from Door A . Flip the three coins and do a look up in the angle degree from Door B . Add them and decide whether you have an acute, right, or obtuse angle . Your opponent may challenge you. Look up the answer in the table on the next page. If you are right and your opponent didn't challenge you, you get a point. If you are right and your opponent did challenge you, you get two points. If you are wrong and your opponent challenged you, your opponent gets a point. If you are wrong and your opponent didn't challenge you, nobody gets a point. Your opponent plays next. 
 vals[0] 
 Angle 


 Coin tosses (largest to smallest):  TTT TTH THT THH HTT HTH HHT HHH


 Angle (degrees) of Door A 50 32 42 78 80 66 38 58


 Angle (degrees) of Door B 22 28 32 40 48 56 68 70

 
  On a different page so the players have to turn to it...  
 

 vals[0] 
 Angle 


 + 50 32 42 78 80 66 38 58


 22 acute angle (72 degrees) acute angle (54 degrees) acute angle (64 degrees) obtuse angle (100 degrees) obtuse angle (102 degrees) acute angle (88 degrees) acute angle (60 degrees) acute angle (80 degrees)


 28 acute angle (78 degrees) acute angle (60 degrees) acute angle (70 degrees) obtuse angle (106 degrees) obtuse angle (108 degrees) obtuse angle (94 degrees) acute angle (66 degrees) acute angle (86 degrees)


 32 acute angle (82 degrees) acute angle (64 degrees) acute angle (74 degrees) obtuse angle (110 degrees) obtuse angle (112 degrees) obtuse angle (98 degrees) acute angle (70 degrees) right angle (90 degrees)


 40 right angle (90 degrees) acute angle (72 degrees) acute angle (82 degrees) obtuse angle (118 degrees) obtuse angle (120 degrees) obtuse angle (106 degrees) acute angle (78 degrees) obtuse angle (98 degrees)


 48 obtuse angle (98 degrees) acute angle (80 degrees) right angle (90 degrees) obtuse angle (126 degrees) obtuse angle (128 degrees) obtuse angle (114 degrees) acute angle (86 degrees) obtuse angle (106 degrees)


 56 obtuse angle (106 degrees) acute angle (88 degrees) obtuse angle (98 degrees) obtuse angle (134 degrees) obtuse angle (136 degrees) obtuse angle (122 degrees) obtuse angle (94 degrees) obtuse angle (114 degrees)


 68 obtuse angle (118 degrees) obtuse angle (100 degrees) obtuse angle (110 degrees) obtuse angle (146 degrees) obtuse angle (148 degrees) obtuse angle (134 degrees) obtuse angle (106 degrees) obtuse angle (126 degrees)


 70 obtuse angle (120 degrees) obtuse angle (102 degrees) obtuse angle (112 degrees) obtuse angle (148 degrees) obtuse angle (150 degrees) obtuse angle (136 degrees) obtuse angle (108 degrees) obtuse angle (128 degrees)