The exterior angles of an octagon are 42°, 55°, 39°, 20°, 62°, 45°, and 47°. what is the measure of the eighth exterior angle? show equations and all work that leads to your answer.

The measure of the eight exterior angle is 50°

Step-by-step explanation:

we know that

The sum of the exterior angles of a polygon must be equal to 360 degrees

so

In this problem

Let

x > the measure of the eight exterior angle

(42+55+39+20+62+45+47+x)°=360°

(310+x)°=360°

x=360°-310°=50°

6 hours 48 min

step-by-step explanation:

68÷5=13.6

13.6×30=408min=6 hours 48 min.

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