Question

one angle of a quadrilateral is 111 degree and the remaining three angles are equal. Find three angles​

Answer 1

Answer:

83 degree

sum of angles in a quadrilateral=360degrees

unknown angle = x

so the three unknown angles are equal that means=3×X=3x

so the equation will be = 3x+111=360

3x+111=360

3x=360-111

3x=249

x=249÷3

x=83 degrees

Answer 2

Answer:

83 degrees.

Step-by-step explanation:

A quadrilateral has 4 angles.

The value of the 4 angles is always equal to 360 degrees.

As one angle is equal to 111 degrees, and other three angles are equal, we can form an equation like this.

360 = 111+3x

360-111 = 3x (Transposing 111 to the other side)

249 = 3x

249/3 = x (Transposing 3 to the other side)

83 = x

x = 83

So, your answer is 83.

Happy to Help