A groin vault is formed by the perpendicular intersection of two barrel vaults. A rib ribbed vault is supported by a series of arched diagonal ribs that divide the vault's surface into panels.
A groin (or cross) vault is formed by the perpendicular intersection of two barrel vaults. A rib (or ribbed) vault is supported by a series of arched diagonal ribs that divide the vault's surface into panels.
The Tell Tale Heart is a good coparison of some challenges many eighth graders might face. Including, the guilt of lying or deceiving someone and being extremely annoyed by someone or something.