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What is an Arch of an inverted catenary shape?
One is the "Gateway To The West" arch in St. Louis, Missouri. It is also possible McDonalds Restaurants have a double inverted catenary arch shape. It resembles a letter M in script form.
Do the spine of the newborn has the shape of a single arch?
yes
Why is the shape of a rainbow an arc?
In reality, the shape of rainbow is a circle. The center of the circle is an imaginary line between the center of the sun and the head of the viewer.
Why is the rainbow shaped like an arch?
Because rainbow is illusion of eyes. It is cause of sun rays hitting water or moist. Rays curve up after hitting rain drops.
Is an arch a mathematical shape?
No shape is mathematical really unless it has been created by a mathematical formula, but is certainly a geometric shape. But anything which is a 2D or 3D shape is geometric. My improvement: A catenary curve from a mathematical equation such as cosh x, is a mathematical and natural shape. Maby each other arch can be approximated by a mathematical formula.
