Function triLLLrA

triLLLrA(
    l1: number,
    l2: number,
    l3: number,
    checkLevel?: ECheck,
): [number, string]
Calculate one angle of a triangle from l1, l2, l3
Parameters
- l1: number
  the first length of the triangle
- l2: number
  the second length of the triangle
- l3: number
  the third length of the triangle
- checkLevel: ECheck = ECheck.eError
  the level of check
Returns [number, string]
one angles of the triangle: a31 + string-for-log
- Defined in index.ts:338