✨ Best Answer ✨
22
ADに線を引く
∠CBD=∠CAD=15
x=90-15=75
23
∠BDC=66-18=48
∠DCA=∠DBA=18
x=48-18=30
24
∠CBD=∠CAD=x
36+x+x=72
→ 2x=36
→ x=18
✨ Best Answer ✨
22
ADに線を引く
∠CBD=∠CAD=15
x=90-15=75
23
∠BDC=66-18=48
∠DCA=∠DBA=18
x=48-18=30
24
∠CBD=∠CAD=x
36+x+x=72
→ 2x=36
→ x=18
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