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3 years ago

If mBDE = 125 what is mGDF? A) 35. B) 45. C) 55. D) 65

Mathematics

2 answers:

Andru [333]3 years ago

8 0

Answer:

The correct answer is choice B) 45.

I just finished the test and the answer was correct.

Hope this helps!!!!!

joja [24]3 years ago

7 0

A supplmentary angle = 180°

∠BDE and ∠BDF are vertical angles, and so are congruent.

∠BDF = 125°, because ∠BDF ≅ ∠BDE.

∠CDA ≅ ∠EDF

∠CDA = 90°

line BJ is angle bisector of ∠CDA. ∠CDB is 1/2 of ∠CDA

∠CDA = 90°

∠CDB = 90/2
∠CDB = 45°

∠GDF is a vertical angle of ∠CDB, and it's measurement will be the same as ∠CDB.

∠GDF ≅ ∠CDB
∠CDB = 45°
∠GDF = 45°

∠GDF = 45° should be your answer

hope this helps

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