Question

9) Four angles of a pentagon are 110, 90, 125 and 140 degree. Find the size of the fifth angle.
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Answer 1

Answer:

75°

Step-by-step explanation:

We know that

Sum of all 5 angles of Pentagon is 540°

since,the size of the fifth angle=

=540- (110+90+125+140)

=540-465

=75°

Answer 2

Answer:

110 + 90 + 125 + 140 + x = 540

Step-by-step explanation:

x + 465 = 540

x = 540 - 465

x = 75 degrees