1. AD 之距离为何?. c9 h0 ]5 H b+ b, G$ H- D; i+ P
b. 65.0780 0 w. Q9 S* Z) Y" ]0 E- R; a4 a2. ∠ABC 之角度值为何? a% S9 x) m7 f
c. 84.912° 0 l G4 T: M# V# l; r/ f# r) i6 H3. a 弧之长度为何? ' ^! L8 q; d8 X, H" w' m9 X b. 37.4818 . O' v1 C1 {6 t) ^4. 此图包围的面积为何?; X+ T. a+ b1 n L* y$ R
c. 3397.8710