Question

Find the measure of arc BC?

Answer 1

`AB=BC`

`3x+24=4x-11`

`3x-4x=-11-24`

`x=35`

`BC=4* 35-1`

`=140-11`

`=129`

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Answer 2

129

Explanation:

Since,

AD = BC

AD = 3x + 24

BC = 4x - 11

3x + 24 = 4x - 11

4x - 11 = 3x + 24

4x - 3x = 24 + 11

x = 35

BC = 4x - 11

= 4 ( 35 ) - 11

= 140 - 11

BC = 129