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3 years ago

What is the measure of ∠CEF?

Mathematics

2 answers:

SIZIF [17.4K]3 years ago

8 0

Answer:

D. 110

Step-by-step explanation:

30+40=70

180-70=110

STatiana [176]3 years ago

5 0

Answer:

∠CEF = 110°

Step-by-step explanation:

ΔBED ,

∠BED + ∠BDE + ∠DBE = 180 {Angle sum property}

∠BED + 40 + 30 = 180

∠BED + 70 = 180

∠BED = 180 -70

∠BED = 110°

∠CEF = ∠BED {Vertically opposite angles}

∠CEF = 110°

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