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23-04-2017
Mathematics

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What's this answer please ?

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23-04-2017

5x and 3x+10 are "vertical angles", opposites about the intersection of two lines, thus they are equal so:

5x=3x+10

2x=10

x=5

so 3x+10 is

3(5)+10=25°

FEG and GEC are complementary angles meaning they sum to 90° so

FEG=90-25=65°

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