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Hitman42 [59]
3 years ago
13

Two chords intersect at a point inside a circle that is not the center of the circle. Which statement must be true?

Mathematics
2 answers:
Illusion [34]3 years ago
5 0

Answer:

The sum of the measures of each pair of vertical angles is equal

to the sum of the measures of the intercepted arcs

Step-by-step explanation:

* Lets study this rule :Angles of Intersecting Chords Theorem.

- If two chords intersect inside a circle, then the measure of the

 angle formed is one half the sum of the measure of the arcs

 intercepted by the angle and its vertical angle.

Ex: Look to the attached figure:

- QS and PR are 2 chords intersect each other inside the circle

- ∠1 subtended by arc PQ , ∠3 subtended by the arc RS

- ∠2 subtended by arc RQ , ∠4 subtended by the arc PS

∴ m∠1 = [measure of arc PQ + measure of arc RS]/2

∴ m∠2 = [measure of arc QR + measure of arc PS]/2

∴ 2m∠1 = measure of arc PQ + measure of arc RS

∴ 2m∠2 = measure of arc QR + measure of arc PS

∵ m∠1 = m∠3 ⇒ vertically opposite angles

∵ m∠2 = m∠4 ⇒ vertically opposite angles

∴ m∠1 + m∠3 = 2m∠1

∴ m∠2 + m∠4 = 2m∠2

∴ m∠1 + m∠3 = measure of arc PQ + measure of arc RS

∴ m∠2 + m∠4 = measure of arc QR + measure of arc PS

* From all above

- The sum of the measures of each pair of vertical angles is equal

 to the sum of the measures of the intercepted arcs

Alchen [17]3 years ago
3 0

Answer:

its c

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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