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chubhunter [2.5K]
3 years ago
13

Find the value of BC. HELP PLEASE!!

Mathematics
2 answers:
AleksandrR [38]3 years ago
8 0
All three sides are the same as indicated by the bars on them.
So
1/2x-2 =3/2x-12
x=10
Masteriza [31]3 years ago
6 0

It's an equilateral triangle, therefore

AB = BC = BA

We have the equation:

\dfrac{3}{2}x-12=\dfrac{1}{2}x-2\qquad\text{multiply both sides by 2}\\\\3x-24=1x-4\qquad\text{add 24 to both sides}\\\\3x=x+20\qquad\text{subtract x from both sides}\\\\2x=20\qquad\text{divide both sides by 2}\\\\x=10

BC=BA\to BC=\dfrac{1}{2}(10)-2=5-2=3

<h3>Answer: BC = 3</h3>
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