Question

Alguien me ayuda? No lo entiendo bien:c me indicaron que sale 120°

Answer 1

Respuesta:

x = 120

Explicación paso a paso:

AB / 2 = BC / 3 = CD / 4 = k

AB = 2k

BC = 3k

CD = 4k

AD = 180

AB + BC + CD = 180

2k + 3k + 4k = 180

9k = 180

k = 180 / 9

k = 20

x = MB + BC + CN

AM + MB = AB

AM = MB

MB + MB = 2k

2MB = 2k

MB = 2k / 2

MB = k

CN + ND = CD

CN = ND

CN + CN = 4k

2CN = 4k

CN = 4k / 2

CN = 2k

x = MB + BC + CN

x = k + 3k + 2k

x = 6k

x = 6(20)

x = 120