theta + 57 = 90

theta = 90 - 57 = 33

for first triangle angle = 57 , base = 21.8 cm.

hypotenus/base = secant theta

hypotenus/21.8 = sec 57

hypotenus = 21.8*1.8361 = 40.02698

= 40.03 cm

for second triangle angle = 33 , base = 40.03 cm.

hypotenus/40.03 = sec 33

hypotenus = 40.03*1.1924 = 47.73 cm

y = 47.73 cm.

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