Răspuns:
Explicație pas cu pas:
∡C =180-A-B=180-130-26=24°
∡ACD=C:2 =24:2 =12°
∡CDA=180-A-ACD=180-26-12 =142°
∡AEC =180-C-CAE=180-24-13=143°
∡CDB =180-DCB-B =180-12-130 =38°
∡AEB =180-BAE-B =180-13-130 =37°
