Question

If the three angles of a quadrilateral are 120 degree 130 degree 10 degree what is the 4th angle

Answer 1

Answer:

By angle sum property of quadrilateral

120+130+10+x=360

260+x=360

x=100

Answer 2

Answer:

The fourth angle of the quadrilateral will be equal to 100° .

Step-by-step explanation:

Given the three angles of quadrilateral are $120^{o}$, $360^{o}$ and $10^{o}$

Consider the forth angle of the quadrilateral is x.

We know the sum of four angles of  a quadrilateral is equal to $360^{o}$

∴        $120^{o}+130^{o}+10^{o}+x=360^{o}$

          $260^{o}+x=360^{o}$

           $x=360^{o}-260^{o}$

           $x=100^{o}$

Therefore for the given angles  of a quadrilateral, the 4th angle comes out to be 100°.