Question

A circle is centered on point B. Points A, C and D lie on its circumference.
If ZADC measures 23°, what does ZABC measure?

Answer 1

Answer:

  46°

Step-by-step explanation:

The central angle has twice the measure of the inscribed angle subtending the same arc. Hence ∠ABC = 2(∠ADC) = 2(23°) = 46°.