Question

Help me please.

Answer 1

Questions here.

Answer 2

@Aveline

Answer 3

1/2(30+x)=123

Answer 4

Ok what next?

Answer 5

That's pretty much it? It's just an equation: "If two secants or chords intersect in the interior of a circle, then the measure of an angle formed is:
1/2 (measure of arc + measure of arc)"

Answer 6

Oh so thats the answer?

Answer 7

123=1/2(30+x)
123=15+(1/2)(x)
108=(1/2)(x)
x=216