43.) For Figure 4, find DE.
6
8
10
12
46.) For Figure 6, 0A = 3 and AC = 12, what is OB?
3sqrt(9)
3 sqrt(3)
7
sqrt(153)
50.) In elliptic or spherical geometry, there can be _____ right angle(s) in a triangle.
zero
one
two
three
51.) For right triangle ACB with right angle C, if m Ang A = 45° and BC = 3, what is the length of AC?
3 sqrt(3)
3
3 sqrt(2)
1.5
53.) In the proof above, the reason for step 3 is
substitution
angle addition
parallel postulate
equal corresponding angles