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-Dominant- [34]
3 years ago
7

Britton rotated trapezoid ABCD 180° on the coordinate plane. If angle B is 20° and angle D is 90°, what is the degree measuremen

t of angle B′?
Group of answer choices

20°

70°

90°

180°
Mathematics
1 answer:
andreyandreev [35.5K]3 years ago
8 0

Answer:

20°

Step-by-step explanation:

Rotation is one of 3 basic rigid transformation, it will not change the original shape and size. Therefore angle B' should be still 20°

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