Co-interior Angles on Parallel Lines

Move point D or point E around. What do you notice about the sum of the blue angles and the sum of the green angles?
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If BGH = 58.27 then what is DHG?
Use your knowledge of: - Right angles. - Supplementary angles. - Complementary angles. - Vertically opposite angles. - Angles on parallel lines. To complete these activities: https://www.transum.org/Maths/Activity/Angle/Chase.asp https://www.transum.org/Maths/Activity/Angle/Chase.asp?Level=2
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– Simon Job, Cameron Ualesi

Information: Co-interior Angles on Parallel Lines