berdasarkan gambar berikut. tentukan nilai x dan y

a). 3x+2x= 90° (karena siku")
5x=90
x=90/5
x=18
b). 5x+x=90° 2x+y=90
6x=90 2.15+y=90
x = 90/6 =15° y=90/30 =3°

c). 4x =90
x =90/4 =22.5°
y=90
y+x = 90+22.5 = 112.5°


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