Mt 322 Topics in Geometry - Fall 2002

Department of Mathematics & Computer Science
CARDINAL STRITCH UNIVERSITY
Sr. Barbara E. Reynolds, Ph.D.

Study Guide for Benchmark Test #1

This benchmark test will contribute 5% to your final course grade. The test will be available September 16. The window-of-opportunity for Benchmark #1 is September 16 - 26. You may arrange with the instructor to take this test outside of class any time during this window-of-opportunity.

This test will have ten problems on material which is prerequisite for this course. The sample benchmark questions give an idea of the difficulty level and type of question to expect on this test. Although the test is not timed, many students in the past have found that they can complete this Benchmark test in 30 - 40 minutes.

To pass this benchmark, a student must get at least nine problems correct, with no partial credits. Although the passing score for the Benchmarks is very high, you do have an opportunity to retake this test if you don't pass it on the first attempt. Since there is a requirement that you study between two attempts of this test, you cannot take (and retake) the test twice on the same day. If you want to take advantage of being able to retake this benchmark, you should attempt it early in this window-of-opportunity.

You may NOT use a calculator or computer as you work on the benchmark test.

Basic Geometry Formulas

You should know and be able to use basic area, perimeter, and volume formulas of geometry.

Lines and Linear Equations

You should be able to work with both linear expressions and graphs of linear equations. You should be able to work with points and lines in a regular two-dimensional coordinate system.

Basic Algebra

You should be able to use basic algebra as a tool in solving problems.

Trigonometry

You should be familiar with basic right-triangle trigonometry for first quadrant angles.


Sample Benchmark Questions

  1. What is the perimeter of a semicircle with diameter 5 cm? (Leave your answer in terms of Pi.)
  2. What is the area of a semicircle of diameter 5 cm? (Leave your answer in terms of Pi.)
  3. A pentagon is formed by adjoining an equilateral triangle to a square so that one side of the triangle fits exactly along one side of the square. What is the perimeter of this pentagon if the length of the side of the square is 5 cm?
  4. How many feetof fencing are needed to enclose a field which is 76 yards wide and 50 yards long?
  5. What if the field in the previous question is adjacent to a river and only needs to be fenced along three sides?
  6. Find the length of the diagonal of a square with sides measuring 5 cm.
  7. If the circumference of a circle is 10 feet, what is its area? (Leave your result in terms of pi.)
  8. If an equilateral triangle has sides of length 3 units, what are the lengths of its altitude and its base?
  9. What is the area of an equilateral triangle with sides of length 5 cm?
  10. A rectangular box has volume 600 cubic inches. If the area of the base is 40 square inches, what is the height of the box?
  11. Plot the point (3, -4) on a rectangular coordinate system. In which quadrant does this point lie?
  12. Let AB be a line segment from (-1, 2) to the point (4, 5). Find the length of AB.
  13. Let AB be a line segment from (-1, 2) to the point (4, 5). Find the midpoint of AB.
  14. Line AB goes through the points (-1, 2) and (4, 5). What is the slope of this line?
  15. Line AB goes through the points (-1, 2) and (4, 5). What is the equation of this line?
  16. What is the slope of a line perpendicular to the line which goes through the points (-1, 2) and (4, 5)?
  17. What is the equation of a line perpendicular to the line through the points (-1, 2) and (4, 5) which passes through the origin?
  18. Find the equation of a line which passes through the point (7,5) and goes through the origin.
  19. Find the length of the line segment from (3,5) to (-4,8).
  20. Find the length of the line segment from (3,5) to (3,8).
  21. Find the midpoint of the line segment from (3,5) to (-3,8).
  22. Write the expression x^3 * x^4 in the form x^p.
  23. Write the expression x^3 / x^4 in the form x^p.
  24. Write the expression (x^3 * x^4)^5 in the form x^p.
  25. Write the expression sqrt(x^3) in the form x^p.
  26. Write the expression 1/ (x^3) in the form x^p.
  27. Write the expression (x^4) / (x^7) in the form x^p.
  28. Find the product: (t^2 + 3t + 3) (t^2 - 5t + 4).
  29. Find the product: (t^2) (3t + 3) (t^2 - 5t).
  30. Use one of the two standard triangles to find an angle whose tangent is 1.
  31. Use one of the two standard triangles to find the sine of a 60-degree angle.
  32. Express 60-degrees in radian measure.
  33. Express 90-degrees in radian measure.
  34. Express 135-degrees in radian measure.
  35. If an angle is Pi/4 radians, what is its measure in degrees?
  36. If an angle is Pi/3 radians, what is its measure in degrees?
  37. If an angle is 2*Pi radians, what is its measure in degrees?
  38. If the sin (t) is a, find expressions for cos (t) and tan (t) in terms of a. (Note: You will need to find the length of the other two sides of the triangle in terms of a.)

Answers to the Sample Questions

  1. 5 + 5 * Pi/2 cm
  2. 25 Pi/8 cm^2
  3. 25 cm
  4. 756 feet (= 252 yards)
  5. 528 feet (= 176 yards) or 606 feet (= 202 yards) depending on which side is along the river
  6. sqrt(50) cm = 5 * sqrt(2) cm
  7. 25 / Pi sq. ft.
  8. 3 sqrt(3) / 2 units, 3 units, 9 sqrt(3) / 2 square units
  9. 25 sqrt(3) / 4 cm^2
  10. 15 inches
  11. (sketch the graph), point lies in Quadrant IV
  12. sqrt(34) units
  13. (3/2, 7/2) = (1.5, 3.5)
  14. 3/5
  15. y - 5 = (3/5) * (x-4), or y = 0.6 x + 2.6
  16. The slope of the perpendicular line is -5/3.
  17. y = -5/3 x
  18. y = 5/7 x
  19. sqrt(58) units
  20. 3 units
  21. (0, 6.5)
  22. x^7
  23. x^(-1) (that is, 1/x)
  24. x^35
  25. x^(3/2)
  26. x^(-3)
  27. x^(-3)
  28. t^4 - 2t^3 - 8t^2 - 3t + 12
  29. 3t^5 - 12t^4 - 15t^3
  30. The angle is Pi/4 or 45-degrees. (Both legs of the triangle have to be equal, so use the 45-45-90 triangle. Tan(45) = tan (Pi/4) = 1.)
  31. Sin(60) = sqrt(3) / 2. (Use the 30-60-90 triangle.)
  32. Pi/3
  33. Pi/2
  34. 3 Pi/4
  35. 45-degrees
  36. 60-degrees
  37. 360-degrees
  38. We have sin(t) = a = a/1. So one leg of the triangle measures a units, the hypotenuse is 1 unit, and the other leg is sqrt(1 - a^2) units.
    So cos(t) = sqrt(1-a^2) / 1 = sqrt(1-a^2), and tan(t) = a/sqrt(1-a^2).



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This page was updated on August 22, 2003.