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Unformatted text preview: 1. Points that are on the same line are collinear. 2. Three noncollinear points determine a plane. 3. Coplanar points are points that lie in the same plane. 4. Two points determine a line. For Exercises 5–8, tell whether each argument uses inductive or deductive reasoning. 5. The rain stopped, and the sun came out. Next, a rainbow will appear. 6. Jose put $25 into savings each week for 10 weeks. Therefore, Jose has put $250 into savings during this period. 7. Quadrilateral RTGL is a rectangle. All rectangles are parallelograms. So quadrilateral RTGL is a parallelogram. 8. The first three numbers of a pattern are 1, 2, 4. So, the next number is 7. Identify the property that makes each statement true. 9. Tell which of the two arguments is invalid. Explain why it is invalid. 13. (a) Vertical angles are congruent. . Therefore, and are vertical angles. (b) Vertical angles are congruent. and are vertical angles. Therefore, ....
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