A circle is centered on point B. Points A, C and D lie on its circumference.
2 answers:
Answer:
<h2>The angle ABC is 70°.</h2>Step-by-step explanation:
You can observe a representation of the problem in the image attached.
According to the inscribed angle theorem, the angle created by two chords is half of its subtended arc, that means
Now, observe that the arc AC has as central angle the angle ABC, according to the theorem, the subtended arc and its central are congruent.
Therefore, the angle ABC is 70°.
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Either one at any given time could be equal to zero. So
x + 2 = 0
x = - 2
x - 18 = 0
x = 18
I've enclosed a graph of this so you can see that the answers I've given are the ones expected.
x + 2 = 0
x = - 2
x - 18 = 0
x = 18
I've enclosed a graph of this so you can see that the answers I've given are the ones expected.