Question

11) If three angles of a quadrilateral are
each equal to 75°, then, the fourth angle
is.. *
O (a) 150°
O (b) 135
O (c) 45°
O (d) 75°​

Answer 1

4th angle = 360 - 3(75) = 360 - 225 = 135

Answer 2

Step-by-step explanation:

${\tt{\red{\underline {\underline {\huge{Answer}}}}}}$

$\huge\underline\mathrm{Given:}$Three angles are 75° each.

_________________________________

we know that sum of all angles of a quadrilateral measures 360°.

let the measure of the 4th angle be X .

${\huge{\mathcal{\pink{Therefore,}}}}$

$75 + 75 + 75 + x = 360$

$225 + x = 360$

$x = 360 - 225$

$x = 135$

hence, the measure of the 4th angle is 135°.

$HEARTLESS BoY♡$