Mark as true any statement that is always true. Mark as false any statement that is never true or that is not necessarily true. Be able to justify your answers.
1. If AB || CD, then AC = BD
2. In parallelogram ABCD, if ?A is a right angle, then ABCD is a rectangle.
3. If a trapezoid has one pair of congruent base angles, then the other pair of base angles is also congruent.
4. Using only a compass and straightedge, you can subdivide a segment into any ratio a:b:c of lengths.
1. F: It depends on the position of points A, B, C and D.
2. T
3. T
4. T
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Use a Venn Diagram and the given information to determine the number of elements in the indicated set.n(U) = 104, n(A) = 41, n(B) = 27, n(C) = 47, n(A ? B) = 3, n(A ? C) = 4, 
and 
Find 
A. 5 B. 35 C. 40 D. 1
Add or subtract as indicated. Write the answer in simplest form.
- 
A. - 
B. - 
C. 
D. 
The polar coordinates of point P are given. Find all of its polar coordinates.P = (4, -?/3)
A. (4, - ?/3 + 2n?) or (-4, - ?/3 + (2n + 1)?) B. (4, - ?/3 + 2n?) or (4, ?/3 + (2n + 1)?) C. (4, - ?/3 + (2n + 1)?) or (-4, - ?/3 + 2n?) D. (4, - ?/3 + 2n?) or (-4, - ?/3 + 2n?)
Evaluate the expression using the given values.
+ 
; x = 4, y = -1, z = 5.
A. 9 B. -8 C. -9 D. 8