Question

If three angles of a quadrilateral are equal, then the measure of the
fourth angle is:
a)90°
b)120°
c)45°
d)none of these
pls send the working​

Answer 1

Answer:

It is given that three angles are equal and measure of fourth angle is 120o.

It is given that three angles are equal and measure of fourth angle is 120o.Let the measure of each of the equal angles be x

It is given that three angles are equal and measure of fourth angle is 120o.Let the measure of each of the equal angles be xWe know that, sum of four measure of angles of quadrilateral is 360o.

It is given that three angles are equal and measure of fourth angle is 120o.Let the measure of each of the equal angles be xWe know that, sum of four measure of angles of quadrilateral is 360o.⇒  x+x+x+120o=360o

It is given that three angles are equal and measure of fourth angle is 120o.Let the measure of each of the equal angles be xWe know that, sum of four measure of angles of quadrilateral is 360o.⇒  x+x+x+120o=360o⇒  3x+120o=360o

It is given that three angles are equal and measure of fourth angle is 120o.Let the measure of each of the equal angles be xWe know that, sum of four measure of angles of quadrilateral is 360o.⇒  x+x+x+120o=360o⇒  3x+120o=360o⇒  3x=240o

It is given that three angles are equal and measure of fourth angle is 120o.Let the measure of each of the equal angles be xWe know that, sum of four measure of angles of quadrilateral is 360o.⇒  x+x+x+120o=360o⇒  3x+120o=360o⇒  3x=240o⇒  x=80o

Step-by-step explanation:

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