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α=54°
sinα=a/10
sin54°=0,8090
0,809= a/10
|AD|=a=8,09
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2. Długość odcinka "b":
cosα=b/10
cos54°=0,5878
0,5878=b/10
b=5,878
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3. Długość odcinka |AB|:
|AB|=15+b
|AB|=15+5,878
|AB|=20,878
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4. Miara kąta |kACD|:
|kACD|=γ
tgγ=x/15
tgγ=8,09/15
tgγ=0,539(3) ≈ 0,5393
γ≈28°18'