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Types of Arches

Equilateral Pointed Arch
Equilateral Pointed Arch

Equilateral arch definition is - a two-centered pointed arch in which the chords of the curves are equal to the span.

image: etc.usf.edu
Lancet Arch
Lancet Arch

Although the pointed arches used are sometimes equilateral and sometimes drop-arches, the lancet-arch is the most characteristic.

Round Arch, or Semi-Circular Arch
Round Arch, or Semi-Circular Arch

Arches with a circular form, also referred to as rounded arches, were commonly employed by the builders of ancient, ... Round arch, or semi-circular arch.

image: alamy.com
Segmental Arch is Less Than a Semicircle
Segmental Arch is Less Than a Semicircle

segmental arch - a section of arch that equals the arc of a circle less than a half circle (p.22-all window arches, p.24-all upper floor window arches, p.28-first floor porch arches). soffit - underpart of an arch, architrave, or overhanging cornice.

source: en.mimi.hu
Shouldered Flat Arch (see Also: Jack Arch)
Shouldered Flat Arch (see Also: Jack Arch)

Arches may be synonymous with vaults, but a vault may be distinguished as a continuous arch forming a roof. Arches appeared as early as the 2nd millennium BC in Mesopotamian brick architecture, and their systematic use started with the ancient Romans, who were the first to apply the technique to a wide range of structures.

Triangular Arch
Triangular Arch

triangular arch. 1. An arch often formed by two large diagonal stones that mutually support each other to span an opening; also called a miter arch.

Unequal Round Arch, or Rampant Round Arch
Unequal Round Arch, or Rampant Round Arch

An arch is a vertical curved ... Unequal round arch, or rampant ... while the later contains examples of both gothic style pointed arch and semicircular arches.