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marshall27 [118]
3 years ago
5

In the diagram below secants PT & PU have been drawn from exterior point P such that the four arcs intercepted have the foll

owing ratio of measurements arc RS: arc ST:arc TI: arc UR= 1:4:4:3.
(a) If arc RE= X then write an equation that could be used to solve for x and find the value of x

(b) state the measure of each of the four arcs. RS, ST, TU, and UR

(c) find the measure of angle P

(d) draw segment UT what would be the measure of angle UTS?

Mathematics
1 answer:
fiasKO [112]3 years ago
4 0

Answer:

  • x = 30°
  • RS = 30°, SR = TU = 120°, UR = 90°
  • ∠P = 45°
  • ∠UTS = 60°

Step-by-step explanation:

(a) If RS = x, then the sum of arcs around the circle is ...

  x + 4x +4x +3x = 360°

  12x = 360°

  x = 30°

__

(b) Based on the given ratios, the arc measures are computed from x. For example, ST = TU = 4x = 4(30°) = 120°

  • RS = 30°
  • ST = 120°
  • TU = 120°
  • UR = 90°

__

(c) Angle P is half the difference of arcs TU and RS:

  ∠P = (TU -RS)/2 = (120° -30°)/2

  ∠P = 45°

__

(d) Inscribed angle UTS is half the measure of the arc it intercepts. Arc RU has the measure (30° +90°) = 120°, so the measure of UTS is ...

  ∠UTS = 120°/2 = 60°

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