Basic Mathematics for College Students

46. CARPENTRY A carpenter cross braced three
    ’s as shown below and then used a tool to
    measure the three highlighted angles in red. Are the
    ’s parallel? Explain your answer.

WRITING

47. PARKING DESIGN Using terms from this section,
    write a paragraph describing the parking layout
    shown below.


48. In the figure below,. Explain why
    .
    l 1 l 2

89°

91°

F

AC

B D

HE

G

m(BDE)91°

l 1 l 2

North side of street

West East

South side of street

Planter

Cross brace

2 × 4

45°

43° 42°

2 × 4

2  4

2  4

49. In the figure below,. Explain why
    .


50. In the figure below,. Explain why the figure must
    be mislabeled.


51. Are pairs of alternate interior angles always
    congruent? Explain.


52. Are pairs of interior angles on the same side of a
    transversal always supplementary? Explain.

REVIEW

53. Find 60% of 120.


54. 80% of what number is 400?


55. What percent of 500 is 225?


56. Simplify: 3.45 7.37 2.98


57. Is every whole number an integer?


58. Multiply:


59. Express the phrase as a ratio in lowest terms:
    4 ounces to 12 ounces


60. Convert 5,400 milligrams to kilograms.

2

1

5

 4

3

7

l 1

l 2

59°

118°

A

D B

E

C

F

H

G

l 1 l 2

100°

l (^1) l
2
AC F
H
B E
D
m(FEH)100°
l 1 l 2
9.2 Parallel and Perpendicular Lines 735