Question

xyzzl

求解

(B)64° (C)73° (D)82°
25. (C)平行四邊形ABCD中,已知AB+CD
20 BC + DA =30
=
5.8
AB + BC = ?
25
(A)10
(B)20
(C)25
(D)50

Answer 1

✨ 最佳解答 ✨

chloeyeh

AB=CD
BC=DA(平行四邊形定義：兩雙對邊平行且等長)
AB+CD=20 AB=10
BC+DA=30 BC=15
10+15=25