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evablogger [386]
2 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]2 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]2 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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