Unformatted text preview: 19. DC EB, so ADC
AEB and ACD
ABE
because they are corresponding angles. By AA
Similarity, ABE
ACD.
AE
¬ AD AB
AC
x2
x26 8(x
8x
5x ¬8 8 5
¬(x 8)(3)
¬3x 24
¬24
¬8 2)
16
16
5x AB CA
ST
BC
BS 15
10 or
35
25
Since CA
ST ¬8
5 x
x 2
2 or 3 3
5
AC x 2 6
8
2 6 or 9 3
5
5
20. ABD and FEC are right triangles with
A
F and right angles B and E. Because all
right angles are congruent, ABD
FEC by AA
Similarity. 15
10 ¬3
8 SR
¬ CB 6(PY)
6(PY)
PY
SY
YW
SY
8 y S(0, 6) 6(SY)
6(SY)
SY B(4, 4) PQ
PS
PQ
3 x O 65
3 AB
or 3 , and
2 , TB
2
45
or 3 .
2
A...
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This note was uploaded on 12/19/2011 for the course MAC 1140 taught by Professor Dr.zhan during the Fall '10 term at UNF.
 Fall '10
 Dr.Zhan
 Calculus, PreCalculus, Angles

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