Determine the value for AB
2 answers:
<h3>
Answer: AB = 14 </h3>
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Explanation:
Use the intersecting chord theorem
AO*OB = DO*OC
2x*10 = (x+3)*8
20x = 8x+24
20x-8x = 24
12x = 24
x = 24/12
x = 2
With that x value in mind, we can find the unknown lengths of each piece of each chord.
AO = 2x = 2*2 = 4 DO = x+3 = 2+3 = 5 Then notice how AO*OB = 4*10 = 40 while DO*OC = 5*8 = 40 as well. Both result in the same value (40) which helps verify the correct x value.
To wrap up the problem, we are looking for the length of chord AB, so,
AB = AO+OB = 4+10 = 14
Answer:
x = 2
AB = 14
Step-by-step explanation:
2x(10) = 8(x+3)
20x = 8x + 24
subtract 8x from both sides
12x = 24
x = 2
Check:
4(10) = 8(5)
40 = 40
Correct
2x = 2 x 2 = 4
4 + 10 = 14
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