Question

Three angles of a quadrilateral are in the ratio 3:3:1 and the fourth angle is 80 find the smallest angle

Answer 1

let the three angles be 3x,3x,1x
sum of all the angles of a quadrilateral is 360 degree
so,
3x+3x+1x+80=360
7x=280
x=40
3x=120

so angles are 120,120,40,80

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Answer 2

Answer:

X= 40

3x= 120

Step-by-step explanation:

3x+3x+3x+80=360

7x+80=360

7x=360-80

7x=280

x= 280/7

x= 40

3x=3×40

3x= 120

hence smallest angle is 40