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Tamiku [17]
3 years ago
13

Please help asap math watch!!

Mathematics
1 answer:
babymother [125]3 years ago
6 0

Answer:

  a) 150°

  b) 30°

Step-by-step explanation:

It is easier to work the exterior angle first.

<h3>b)</h3>

The sum of exterior angles is 360°. The exterior angle at any vertex of a regular dodecagon will be 1/12 that:

  360°/12 = 30° . . . the measure of one exterior angle

__

<h3>a)</h3>

The measure of an interior angle will be the supplement of the adjacent exterior angle.

  180° -30° = 150° . . . the measure of one interior angle

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