Corresponding angles: ∠B and ∠D ∠BAC and ∠ACD ∠BCA and ∠CAD.

Question 2: corresponding edges: AB and AC AM and AN BN and MC.

Corresponding angles: ∠B and ∠C ∠BAN and ∠MAC ∠ANB and ∠AMC.

Question 3: (1): corresponding sides: EG and HN FG and HM EF and MN.

Corresponding angles: ∠F and ∠M ∠E and ∠N ∠MHN and ∠EGF.

(2):∫ef = 2. 1cm ∴mn=ef=2. 1cm∫HN = 3.3cm ∴eg=hn=3.3cm∫eh = 1. 1cm ∴hg=eg-eh=3.3- 1. 1=2.2cm

Question 4: A: Equal; ∫△ABC?△dec ∴∠dce=∠bca∫∠DCA =∠DCE-∠ace∠BCE =∠BCA-∠ace ∴∠dca=∠bce