Mathematics
Junior High
求解 我看不懂(;´༎ຶД༎ຶ`)
W
3. △ABC中,現以A為圓心,5單位長為半徑,分別交AB、BC於D、E,今在弧DE上取P點,
AB上取 Q 點、BC上取R點,已知∠A=60° 請問△PQR最小周長為多少?
(只需計算出答案,不須證明所求的值為最短)
553
音+糖+5
B
D
E
6
C
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求解 看完題目還是毫無頭緒