1. Mrs. Rivas International Studies Charter School.

2. The first two bumper stickers are false, but the third one is true. Mrs. Rivas International Studies Charter School.

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6. Hypothesis: an angle measures 130 Conclusion: the angle is obtuse. If the animal is a Dolphin, then it is a mammal. Mrs. Rivas International Studies Charter School.

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9. a. FALSE; January has 28 days, plus 3 more. b. TRUE; the sum of the measure of two angles that form a linear pair is 180. Mrs. Rivas International Studies Charter School.

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19. Mrs. Rivas If the figure is a square, then the figure is a quadrilateral. If the figure is a quadrilateral, then the figure is a square. If the figure is not a square, then the figure is not a quadrilateral. False: Rectangles are quadrilaterals but they are not squares False: It could be a rectangle, rhombus, or trapezoid If the figure is not a quadrilateral, then the figure is not a square. True

20. Mrs. Rivas If a vegetable contains beta carotene, then it is a carrot. If the vegetable is not a carrot, then it does not contains beta carotene. False: spinach, beets, pumpkins, sweet potatoes If the vegetable does not contains beta carotene, then it is not a carrot. False: spinach, beets, pumpkins, sweet potatoes True

21. Practice Worksheet Section 2-2 Mrs. Rivas International Studies Charter School.