Question

( b )Find x + y + z + w​

Answer 1

Answer:

x = 80 ° because it alternate to 80 °

y = 60 ° because it alternate to 60 °

w = 120 ° because it is alternate to 120°

z = 120 ° because it is alternate to w .

SUM:

80 ° + 60 ° + 120 ° + 120 °

380 °

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Answer 2

Answer:

360°

Step-by-step explanation:

Unknown interior angle= 360°-260°= 100°

x= 180°-120°= 60°

y= 180°-80°= 100°

z= 180°-60°= 120°

w= 180°-unknown angle= 180°-100°=80°

x+y+z+w= 60°+100°+120°+80°= 360°

Also there is a property that sum of  all exterior angles of a polygon, whether a triangle or a quadrilateral or a pentagon or polygon with x sides where value of x can be any number between 3 to 10 is 360°.

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