∠ВAE =180-∠AEB-∠B=180-79-90=11°,
∠C=180-∠A-∠B=180-79-69=32°
∠DBE=90-∠C=90-32=58°
∠ABO=79-∠DBE=58°
∠ AOB=180°-(∠BAE+∠ABO)=180-(11+58)=111°
∠ВAE =180-∠AEB-∠B=180-79-90=11°,
∠C=180-∠A-∠B=180-79-69=32°
∠DBE=90-∠C=90-32=58°
∠ABO=79-∠DBE=58°
∠ AOB=180°-(∠BAE+∠ABO)=180-(11+58)=111°