Question

if the three angles of a quadrilateral are 120°,130°,10 then what is the fourth angle ?​

Answer 1

Answer:

sum of a quadrilateral is 360 degree

100 degree is the value of fourth angle

Answer 2

Given,

• The three angles of a quadrilateral are 120°,130°,10°.

To find,

• We have to find the fourth angle.

Solution,

We can simply find the fourth angle of a quadrilateral by using the angle sum property of a quadrilateral.

  In the quadrilateral say ABCD,

∠A + ∠B +∠C +∠D = 360°     [ Angle sum property]

120°+130° + 10° +∠D = 360°

              260°  +∠D = 360°

                           ∠D = 360° -260°

                            ∠D = 100°

∴The fourth angle of a quadrilateral is 100°.

Hence, if the three angles of a quadrilateral are 120°,130°,10 then the fourth angle of a quadrilateral is 100°.