A hexagon has five angles that measure 140° each. What is the measure of the sixth angle?

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Answer 1 · 2018-03-10T16:51:30

$20^o$

The answer is $20^o$ because:

5 sides:

$140*5=700" "$ or $" "140+140+140+140+140=700$

We will add up all the sides to get the total of all the 5 sides.

6 side: $720-700=20$

We will now subtract the total of all the 5 sides, which is $700^o$ , from the total angle of the hexagon, which is $720^o$ , to get the 6th side.

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Answer 2 · 2018-03-10T17:09:13

20

Sum of internal angles in a hexagon is 720
Five angles is 140x5=700
Remaining angle is 720-700=20