Question

three angles of a quadrilateral are 70 ,80 and 100 find fourth ​

Answer 1

Answer:

Sum of angle of a quadrilateral= 360

Let x be the angle of fourth.

Niw,

70+80+100+×= 360

250+x=360

x=360-250

x=110

.

. . the angle of fourth=110

Answer 2

Step-by-step explanation:

first add the three angles= 70+80+100=260

since,the total sum of the quadrilateral is 360°.

:. the fourth degree of quadrilateral = 360 -260= 100

:. the fourth degree of quadrilateral = 100