Question

M∠1 = _°

a) 110
b) 140
c) 170

Answer 1

∠1 =
`(1)/(2) (280 - 60) = 110`

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Answer: 110°
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Answer 2

Option a
`110\°`

Explanation:

we know that

The measurement of the external angle is the semi-difference of the arcs which comprises

so

in this problem

`m<1=(1)/(2)(280\°-60\°)=110\°`