25. Reasoning Review the reflexive, symmetric, and transitive properties for congruence in Lesson 2-5. Write reflexive, symmetric, and transitive statements for “is parallel to” (||). Tell whether each statement is true or false. Justify your answer.
26. Reasoning Repeat Exercise 25 for “is perpendicular to” (⊥).

Standardized Test Prep

SAT/ACT

27. In a plane, line e is parallel to line f, line f is parallel to line g, and line h is perpendicular to line e. Which of the following MUST be true?
    1. e || g e vertical linevertical line g
    2. h || f h vertical linevertical line f
    3. g || h g vertical linevertical line h
    4. e || h e vertical linevertical line h
28. Which point lies nearest to (5, 2) in the coordinate plane?
    6. ( − 1 , 3 ) open negative 1 comma 3 close
    7. ( 0 , − 2 ) open 0 comma negative 2 close
    8. ( 4 , − 5 ) open 4 comma negative 5 close
    9. (4, 10)
29. Which of the following is NOT a reason for proving two lines parallel.
    1. The lines are both ⊥ to the same line.
    2. Corresponding angles are congruent.
    3. Vertical angles are congruent.
    4. The lines are both || to the same line.

Short Response

30. The diameter of a circle is the same length as the side of a square. The perimeter of the square is 16 cm. Find the diameter of the circle. Then find the circumference of the circle in terms of π . pi .

Mixed Review

See Lesson 3-3.

Algebra Determine the value of x for which a || b . eh vertical linevertical line b .

See Lesson 1-4.

Use a protractor. Classify each angle as acute, right, or obtuse.

Get Ready! To prepare for Lesson 3-5, do Exercises 36–39.

See p. 834.

Solve each equation.

36. 30 + 90 + x = 180 30 plus . 90 plus . x equals 180
37. 55 + x + 105 = 180 55 plus , x plus . 105 equals 180
38. x + 50 = 90 x plus . 50 equals 90
39. 32 + x = 90 32 plus . x equals 90

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