find the unknown x
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= 40° + 30° + angle D = 180° (Angle sum property of triangle)
= 70° + angle D = 180°
= Angle D = 180° - 70°
= Angle D = 110°
= Angle x + 110° = 180° (Linear pair)
= Angle x = 180° - 110°
= Angle x = 70°
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Photography is the art, application, and practice of creating durable images by recording light, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as photographic film.
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