For 1
. AD = CDDE = DG∠ ad =∠CDG
∴△ADE≌CDG (edge theorem)
∴AE=CG
two people
According to 1, ∠AED=∠CGD.
∴∠mge+∠gem=∠dge+∠cgd+∠gem=∠dge+∠aed+∠gem=90
∴AE⊥CG
Three people
From the above, we can know that △ degree and △MGE are right triangles.
∴ mdeg * * cycle
∴∠DME= 1/2∠DOE=45
∠ Meg = 1/2 ∠ gom ≠ 45 (obviously ∠ gom ≠ 90).
∴∠DME≠∠MEG
∴DM and GE are not parallel
Four people
∫△MGE is a right triangle.
O is the midpoint.
∴OM= 1/2GE=OD
For 5
From the solution process of 3, we can know that ∠ DME = 45 is correct.
To sum up, choose 1. 2。 4。 5。 Option c
I hope I can help you!
Hope to adopt!