Question

Three angles of a quadrilateral are equal and the measure of the 4th angle is 120°. Find the measure of each of these equal angles.​

Answer 1

Answer:

Step-by-step explanation:

Let angle is x

x+x+x+120°=360°

Or,3x+120°=360°

Or,3x=360°-120°

Or x=80°

Answer 2

Answer:

$80^{0} ,80^{0} ,80^{0} ,120^{0}$

Step-by-step explanation:

Given data:

• Three angles of a quadrilateral are equal and the measure of the $4th$ angle is $120^{0}$

• As per the data given in the question, we need to find the measure of each angle of the quadrilateral

• As we know, sum of the angles of a quadrilateral $=360^{0}$

• Let one of the equal angle be $x$

• According to the given data,

$x+x+x+120=360$

$3x=360-120$

$3x=240$

$x=80$

Hence, the measure of the angles are $80^{0} ,80^{0} ,80^{0} ,120^{0}$.