Question

The 3 angles of a quadrilateral are 60, 80,and 100 what is sum of the fourth angle

Answer 1

Answer:

120°

Step-by-step explanation:

First angle+ Second angle+ Third angle+ Fourth angle= sum of all angles of a quadrilateral

60°+80°+100°+Fourth angle= 360°

240°+Fourth angle= 360°

Fourth angle= 360°-240°

Fourth angle= 120°

Answer 2

Answer:

Sum of all angles of quadrilateral is 360°.

Step-by-step explanation:

let the 4th angle be X

so , to find the 4th angle we should have to subtract the sum of 3 angle from 360°

A/Q

60 °+ 80° + 100° + x = 360°

260° + x = 360°

x = 360° - 240°

x = 120°

Therefore the 4th angle will be 120°