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Zepler [3.9K]
3 years ago
15

The figure shows a circle with center P and inscribed isosceles Triangle ABC. If AC has the same length as the radius of the cir

cle, what is the measure of angle ABC

Mathematics
1 answer:
Ksenya-84 [330]3 years ago
7 0

Answer:

<ABC = 30^{0} (The central angle of a circle is twice any inscribed angle subtended by the same arc).

Step-by-step explanation:

From the diagram, ABC is an inscribed isosceles triangle. But the radius of the circle equals the length AC.

Join P to A and C to form an equilateral triangle. An equilateral triangle has equal sides and angles. So, the value of each interior angle of the equilateral triangle is;

Sum of angle in a triangle = 180^{0}

So that each interior angle = \frac{180^{0} }{3}

                                            = 60^{0}

The value of each interior angle of the triangle is 60^{0}. Thus, <APC = 60^{0}.

⇒ <ABC = 30^{0} (The central angle of a circle is twice any inscribed angle subtended by the same arc.)

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