Question

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

Answer 1

`20^o`

Explanation:

The answer is `20^o` because:

• Total sum of interior angle: `720^o`
• Each angle measures: `140^o`
• 6 side: ?

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

20

Explanation:

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