A Groin Vault is formed by arches intersecting at what angle?

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Multiple Choice

A Groin Vault is formed by arches intersecting at what angle?

Explanation:
A groin vault is formed by the crossing of two barrel vaults, and the arches intersect at right angles. That perpendicular intersection—90 degrees—creates the groins, the curved edges where the vaults meet. This arrangement distributes weight to four supporting piers and allows for larger, lighter spaces than a single vault could. The other angles wouldn’t produce the characteristic cross-in-Plan form of a groin vault, and 180 degrees would be a flat surface rather than a vault.

A groin vault is formed by the crossing of two barrel vaults, and the arches intersect at right angles. That perpendicular intersection—90 degrees—creates the groins, the curved edges where the vaults meet. This arrangement distributes weight to four supporting piers and allows for larger, lighter spaces than a single vault could. The other angles wouldn’t produce the characteristic cross-in-Plan form of a groin vault, and 180 degrees would be a flat surface rather than a vault.

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