riyamathew221
riyamathew221 riyamathew221
  • 03-12-2021
  • Mathematics
contestada

Help! I dont understand this

Help I dont understand this class=

Respuesta :

sqdancefan
sqdancefan sqdancefan
  • 05-12-2021

Answer:

  B.  61

Step-by-step explanation:

The sum of arcs around a circle is 360°. This means ...

  110° +128° +c° = 360°

  c° = 122° . . . . . . . . . . . . . subtract 238°

__

An inscribed angle in a circle has half the measure of the arc it subtends.

  a° = 1/2c° = 1/2(122°) = 61°

__

The other angles in the diagram are ...

  b° = 1/2(110°) = 55°

  d° = 1/2(128°) = 64°

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