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Please help solve this question​

Please help solve this question​-example-1
User Alvin Sartor
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1 Answer

15 votes
15 votes

95141 1404 393

Answer:

  • arc BC: 8.55 cm
  • chord BC: 8.03 cm

Explanation:

The length of an arc that subtends central angle α will be ...

s = rα . . . . where α is in radians

The central angle BOC is twice the measure of angle QBC, so is 70°, or 7π/18 radians. So, the length of arc BC is ...

s = (7 cm)(7π/18) ≈ 8.55 cm . . . arc BC

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For central angle α and radius r, the chord subtending the arc is ...

c = 2r·sin(α/2)

c = 2(7 cm)sin(35°) ≈ 8.03 cm . . . . chord AB

User Georgiy
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