Review Questions
6.1 Lines and Angles
 
6.2 Triangles
 
6.3 Polygons
 
6.4 Circles
 
 
6.5 Key Formulas
 
6.6 Review Questions
 
6.7 Explanations
 
Review Questions
1. In the figure below, lines l and m are parallel, and AB = 5. What is the perpendicular distance between lines l and m?
Note: Figure may not be drawn to scale.
(A)
(B)
(C)
(D) 5
(D) 5
2. In the figure below, line CF is the perpendicular bisector of AB, and the area of triangle CDB is equal to the area of triangle CEA. Which of the following statements must be true?
  I. Line CF is the perpendicular bisector of ED.
 II. E and D are the midpoints of BF and AF, respectively.
III. Triangles CEB and CDA have the same area.
Note: Figure may not be drawn to scale.
(A) I only
(B) II only
(C) III only
(D) I and II only
(D) I and III only
3. A triangle and a square have the same base and equal areas. If the length of the common base is x and the height of the triangle is h, what is the height of the triangle in terms of x?
(A)
(B)
(C) 2x
(D)
(D) 4x
4. If ABCD is a rhombus and ABD is an equilateral triangle, what is the area of the rhombus?
Note: Figure may not be drawn to scale.
(A) 4
(B) 4
(C)
(D) 8
(D) 16
5. Circle D has radius 8. What is the length of arc AB in terms of a, b, and c?
Note: Figure may not be drawn to scale.
(A)
(B)
(C)
(D)
(D)
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