The phrase "at its corner" is correct and usable in written English.
It can be used to describe a specific location or position related to the corner of an object or area.
Example: "The cat sat quietly at its corner, watching the birds outside the window."
Alternatives: "in its corner" or "by its corner".
The results show that the largest die tends to experience highest stresses at its corner and has more influence on the warpage of the package than smaller dice.
In this image, laser light enters a synthetic diamond from a facet at its corner and bounces around inside the diamond until its energy is exhausted.
He stood, lunged out of the water, dashed to the wall and took a firing position at its corner, to cover the Marines farther out in the field.
Fig. 4. The Fe particle was cubic because the (110) lattice can be seen at its corner.
A small shack, made of canvas and plastic stood at its corner, separated from the construction site by six feet of bamboo fence.
But the stadium's bowl shape not unlike the larger Court 1, or Bullring, at Roland Garros, in Paris makes for decent sight lines, even from the seats farthest from the court, at its corners, and if it's a great match it can be enthralling to share with thousands of others.
The element has a triangular shape and it has three nodes at its corners, three mid-side nodes on each side and four nodes within the element.
"Propped up at its corners by a cigar store and a Starbucks.
The unit was then tested with 20 cm × 20 cm × 20 cm concrete mortar containing four rebars at its corners.
For iron, the lattice arrangement can best be visualized by a unit cube with eight iron atoms at its corners.
El Escorial, with four sharply pointed towers at its corners, provides a powerful backdrop for the first show.
