Question

find the unknown angles ​

Answer 1

Answer:

x=140° y=40°

Step-by-step explanation:

By angle sum property of a quadrilateral.....

100°+80°+40°+x=360

x=360°-220°

x=140° [1]

Now we know that x+y=180°because it is a linear pair

x+y=180° {putx=140°[1]}

140°+y=180°

y=40°

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Answer 2

Answer:

x = 140

y = 40

Step-by-step explanation:

The sum of all the angles of a quadrilateral is 360

so, 100+80+40+x = 360

220+x = 360

x = 360-220=140

x+y = 180 [Linear pair]

140+y = 180

y = 180-140

y = 40

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