Question

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Answer 1

AD + CD = 36 cm

AB + BC + CD + CD = 36

AB = BC

BC + BC + 2CD = 36

2BC + 2CD = 36

2(BC + CD) = 36

BC + CD = 18

BD = 18 cm

Distancia entre los puntos medios de AC y BD = x

AC + BD = 18 + 12

AC + BD = 30

AC / 2 + BD / 2 = 30 / 2

AC / 2 + BD / 2 = 15

AD = 20 cm

AC / 2 + x + BD / 2 = 20

x + AC / 2 + BD / 2 = 20

x + 15 = 20

x = 20 - 15

x = 5 cm