Question

Four angles of a pentagon are 100°, 175°, 85° and 75º. Find the fifth angle.
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Answer 1

Answer:

65°

Step-by-step explanation:

We know sum of a pentagon = 540°

Let the fifth angle be x degree

(100 + 175 + 85 + 75 + x ) ° = 540

x = 540 - (100 + 175 + 85 + 75)

x= (540 - 435)°

x = 65° Ans.

Answer 2

Answer:

Your answer

Step-by-step explanation:

As we know sum of all angles

of Pentagon is 540°.

In Pentagon there are 5 angles and

4 angles are gives

let 5th angle be a

According to question.

100°+175°+85°+75°+ a = 540°

435°+a = 540°

a = 540°-435°=105°

Hence the final answer is 105°.

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