Inscribed Angles

Question 1

The measure of arc QS is (4x – 18)°.What is the value of x?

Revolt · Accepted Answer

49.5

Question 2

What did you include in your response? Check all that apply.

Revolt · Accepted Answer

A circle measures 360°.; A semicircle measures 180°.; Half of 180° is 90°.; A right angle measures 90°.

Question 3

⇒ 168

Revolt · Accepted Answer

115639

Question 4

⇒ 81

Revolt · Accepted Answer

115640

Question 5

The measure of ∠B is (3x – 4 )° and the measure of ∠D is (2x – 6)°. What are the measures of angles B and D?

Revolt · Accepted Answer

✔ 110; m∠B = °: 110; m∠D = °: 70

Question 6

35 38✔ 7076

Revolt · Accepted Answer

✔ 70

Question 7

∠FAE measures 72°. What other angle must measure 72°?

Revolt · Accepted Answer

∠FBE

Question 8

Explain how you can use the inscribed angle theorem to justify its second corollary, that an angle inscribed in a semicircle is a right angle.

Revolt · Accepted Answer

A circle measures 360°, so a semicircle (which is half the circle) measures 180°. According to the inscribed angle theorem, the measure of an inscribed angle is half the measure of its intercepted arc. Since an angle inscribed in a semicircle intercepts an arc of 180°, the measure of the inscribed angle is half of 180°, which is 90°. Therefore, the angle is a right angle.

Question 9

and are diameters of circle T. What is the measure of ?

Revolt · Accepted Answer

100°

Question 10

What is the measure of ?

Revolt · Accepted Answer

50°

Inscribed Angles Answers

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