marcoduuuh
What is the measure of <X?
(Picture below.)



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marcoduuuh
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jazy
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The interior angles of a triangle always add up to 180 degrees.
80 + 60 + x = 180
180  80  60 = x
x is your missing angle.

marcoduuuh
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x=40.
Thank you! (:

TheViper
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Angle Sum Property of a Triangle :
The sum of all the three angles in a triangle is equal to \(180^0\).

marcoduuuh
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Thank you @TheViper !

TheViper
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np :)

jazy
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yw. (: And exactly what @TheViper said. (: