Question

8. Two angles of a quadrilateral measure 60° each. The third angle is 140°. What is the measure of the fourth angle?​

Answer 1

let the missing angle be x .

sum of all angle is 360

60+60+140 +x = 360

x= 360-140+120

x= 100

hence the missing angle be 100

Answer 2

$\huge {\colorbox {pink}{\color{purple}{☯ Solution ☯}}}$

Let the fourth angle be $x$

By angle sum property,

Sum of all angles = 360°[/tex]

$So, 60° + 60° + 140° + x = 360°$

$260° + x = 360°$

$x = 360° - 260°$

${\boxed {x = 100°}}$

$\pink {▣▣▣▣▣▣▣▣▣▣▣▣▣▣▣▣▣▣}$

Hope it helps uh :)