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question no.20 &21.
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20
a = 65°
b=115°
c=110°
21
x=60°
y=30°
your answers are wrong!
terribly sorry
that's ok, but make sure to correct them
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there you go
21.
a = 180 - 50
a = 130 degrees
angle DEF = angle EFD = (180-50)/2. (angles in an isosceles triangle)
b =130/2 = 65 degrees
b= 65 degrees
c = 180 - 65 = 115 degrees. (linear pair)
22.
x = angle SQP = 60 degrees. (alternate interior angles)
x + y + 90 degrees = 180 degrees. (angle sum property)
60 degrees + y = 90 degrees
y = 30 degrees
that's it
21.
a = 180 - 50
a = 130 degrees
angle DEF = angle EFD = (180-50)/2. (angles in an isosceles triangle)
b =130/2 = 65 degrees
b= 65 degrees
c = 180 - 65 = 115 degrees. (linear pair)
22.
x = angle SQP = 60 degrees. (alternate interior angles)
x + y + 90 degrees = 180 degrees. (angle sum property)
60 degrees + y = 90 degrees
y = 30 degrees
that's it
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