Question

S
9. Three angles of quadrilateral are
122°,50°,80° .Find the fourth angle​

Answer 1

Answer:

using the formula

Step-by-step explanation:

a+b+c+d=360

122+50+80+x=360

252+x=360

x=360-252

x=108

then angle d=108

u can check like this 252+108=360

then if it is angle d=108

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Answer 2

Answer:

x=28°

Step-by-step explanation:

let the 4th angle is x

sum of all four angles of a quadrilateral=360

so 122+50+80+x=360

152+x=180

x=180-152

x=28°