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evablogger [386]
3 years ago
8

Which is the measure of line segment AB? A)10 feet B)15 feet C)20 feet D)100 feet

Mathematics
2 answers:
nalin [4]3 years ago
6 0

Answer:

AB= 20 feet

Step-by-step explanation:

Given triangle ABC is a right angle triangle

Use trigonometric ratio to find the length of the Side AB

AB is the hypotenuse

Sin = opposite side divide by hypotenuse

sin(B)= \frac{AC}{AB}

sin(30)= \frac{10}{AB}

Cross multiply it

sin(30) \cdot AB= 10

AB= \frac{10}{sin(30)}

AB= 20 feet

zavuch27 [327]3 years ago
5 0
Find the last angle:
180-(30+90)
180-(120)
60

Evaluate using sine rule:
\frac{c}{sinC}=\frac{b}{sinB}

c=\frac{bsinC}{sinB}

=\frac{10sin90°}{sin30°}

=20

The length of line segment AB is 20 feet (answer choice C)
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For f(x) = 3x + 1 and g(x) = x^2 - 7, find f(g(4)).
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First, let's find g(4). After we find it, we can substitute the value into f(x).


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4 0
3 years ago
Math 2 Of high school
Daniel [21]

Answer:

  • B. BC = 18 so ∆ABC ~ ∆DEF by SAS

Step-by-step explanation:

\bf \cfrac{AB}{DE}  =  \cfrac{BC}{EF}

  • \bf \cfrac{15}{10}  =  \cfrac{BC}{12}
  • \bf  \cfrac{3}{2}  =  \cfrac{BC}{12}
  • \bf BC =  \cfrac{3}{2}  \times 12
  • \bf 3 \times 6
  • \bf BC = 18
  • \bf \angle B = \angle \: E

So, ∆ABC ~ ∆DEF by SAS.

<h3><u>------------------------------------</u></h3>
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