1) [tex]A=2C \\ C= \frac{1}{2} A \\ \frac{3}{4} A=B=D \\ A+ \frac{1}{2} A+2* \frac{3}{4} A=360 \\ A+ \frac{1}{2} A+ \frac{3}{2} A=360 \\ A+2A=360 \\3A=360 \\ A=120 \\ B=D=90 \\ C=60[/tex]
2) [tex]ABC=108 \\ BAD=108 \\ ABD=37 \\ BDC=80 \\ DBC=108-37=71 \\ BDA=180-108-37=35 \\ ADC=35+80=115 \\ BCD=360-115-108-108=29[/tex]