Question

Four angles of a pentagon are 100,175,85 and 75. Find the 5 angle

Answer 1

we know that sum of angles in a pentagon equal to 540.
100+175+85+75+X=540
435+X=540
x=540-435
x=105
the other angle is 105

Answer 2

Four angles of a pentagon are –

ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ100, 175, 85 and 75

• Sum of a pentagon = 540°

The 5 angle of a pentagon will be ? when there are 4 provided angles

→ considering the fifth angle as x

→ 100 + 175 + 85 + 75 + X = 540°

→ 435 + x = 540°

→ X = 540 – 435

→ X = 105°

So, the 5th angle of pentagon = 105°