10-01-2018
Mathematics

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....Math I need help

Math I need help class=

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choixongdong choixongdong

10-01-2018

m<FIB = 90 - (4x+3)
m<FIB = 87 - 4x

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m<HFG = 90 - (5x + 4)
m<HFG = 86 - 5x

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<BCF = 180 - (<CBF + <CFB)
<CBF = 10x + 3
<CFB =90 - <CFD
but <CFD = <HFG = 86 - 5x (vertical angles)

<CFB =90 -(86 - 5x) = 4 + 5x

<BCF = 180 - (10x + 3 + 4 + 5x)
<BCF = 180 - (15x + 7)
<BCF = = 173 - 15x

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