Answer:
angle A = Angle C: verticle angle
angle B = Angle D: verticle angle
angle E = Angle G: verticle angle
angle F = Angle H: verticle angle
angle B and A are supplementary
angle D and C are supplementary
angle E and F are supplementary
angle H and G are supplementary
for saken it is better to use ordinary calculator than cp because they have a big difference. That's all I can say
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Step-by-step explanation: