it is important because he supposedly raped mayella Ewell. mayella had bruises on the right side of her face which means that a left handed person beat her up. but bob Ewell is left handed so the jury assumes that bob did commit the crime but he is white and tom robinson is black so tom loses the case anyways.
Because it shows that he is left handed and could have punched Mary Ewell on the right hand side.
Atticus makes Bob Ewell write his name in court to show that he is left-handed. This is to suggest that Bob Ewell was the one who attacked Mayella Ewell, since the injuries on her face were consistent with a left-handed person.
Atticus made him write on a piece of paper and noticed that he wrote with his left hand.
Tom Robinson was found to be left-handed during the trial in "To Kill a Mockingbird." This fact was crucial because it contradicted the prosecution's version of events, showing that Tom couldn't have been the one to cause the injuries to Mayella Ewell.
The alleged offender (Tom Robinson) was right handed, while the bruises were on her left side, indicating that Tom Robinson did not commit the crime. Rather, Mr. Ewell, who is left handed, did it.
Atticus suggested that Mayella Ewell was likely injured by someone left-handed based on the bruises on her face. He believed it was her father, Bob Ewell, who was left-handed and had a history of being abusive towards his daughter.
Atticus proves that Bob Ewell is left handed. Since most of Mayella Ewell's injuries were sustained on the right side of her face, then she was most likely beaten by a left handed person. Tom Robinson couldn't use his left hand because of an accident when he was younger, therefore, he couldn't have beaten Mayella.
During Tom Robinson's trial in "To Kill a Mockingbird," Atticus established that Mr. Ewell is left-handed by emphasizing the fact that Mayella's injuries were on the right side of her face, implying that they were likely inflicted by someone who was left-handed. Atticus highlighted this discrepancy to suggest that Bob Ewell, not Tom Robinson, was responsible for the alleged assault.
Atticus proves that Bob Ewell is the one who hit Mayella by highlighting inconsistencies and lies in his testimony during the trial. Atticus demonstrates that Ewell is left-handed, which is consistent with the bruises on Mayella's face indicating a left-handed assailant. Additionally, Atticus questions Ewell about his motives and reveals that he is seeking revenge on Tom Robinson and his family.
Atticus made him write on a piece of paper and noticed that he wrote with his left hand.
The audience sees that Bob Ewell is left-handed when Mr. Gilmer asks him if he is ambidextrous. Bob Ewell confirms that he uses his left hand for most things, like signing his name. This detail becomes important later in the trial as it points to Bob Ewell being the likely assailant in the attack on Mayella Ewell.
Atticus had Mr. Ewell write his name to show that he was left-handed. The girl was beaten by someone who lead with his/her left hand. Tom Robinson could not even use his left hand, therefore he could not have beaten her; just proving further that the trail was a farce. Atticus was trying to suggest that it was Mr. Ewell who beat Mayella, not Tom--Mr. Ewell was left-handed, and Tom couldn't even use his left-hand. Atticus then proceeds to question Mayella about her home life*, further driving his point home. Check out the link as well to get some more plot info. *how her father is always drunk and angry and how she takes care of all her siblings on her own