Nausicca202 Nausicca202

03-10-2017
Mathematics

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Geometry help please

Geometry help please class=

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choixongdong choixongdong

03-10-2017

EC bisects so m<BEC = m<CED

11x - 12 + 2(4x + 1) = 180
11x - 12 + 8x + 2 = 180
19x - 10 = 180
19x = 190
x = 10

m<AEB= 11x - 12 = 11(10) - 12 = 98
m<CED = 4x+1 = 4(10) + 1 = 41
m<BEC = m<CED = 41
so
m<AEC = m<AEB + m<BEC
m<AEC = 98 + 41
m<AEC =139

answer
m<AEC =139

Answer Link

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