Question

which facilities are available at the railways station​

Answer 1

Answer:

Explanation:

This article is about four-sided mathematical shapes. For other uses, see Quadrilateral (disambiguation). Quadrilateral Some types of quadrilaterals Edges and vertices 4 Schläfli symbol {4} (for square) Area various methods; see below Internal angle (degrees) 90° (for square and rectangle) In Euclidean plane geometry, a quadrilateral is a polygon with four edges (sides) and four vertices (corners). Other names for quadrilateral include quadrangle (in analogy to triangle), tetragon (in analogy to pentagon, 5-sided polygon, and hexagon, 6-sided polygon), and 4-gon (in analogy to k-gons for arbitrary values of k). A quadrilateral with vertices {\displaystyle A}, {\displaystyle B}, {\displaystyle C} and {\displaystyle D} is sometimes denoted as {\displaystyle \square ABCD}.[1][2] The word "quadrilateral" is derived from the Latin words quadri, a variant of four, and latus, meaning "side". Quadrilaterals are either simple (not self-intersecting), or complex (self-intersecting, or crossed). Simple quadrilaterals are either convex or concave. The interior angles of a simple (and planar) quadrilateral ABCD add up to 360 degrees of arc, that is[2] {\displaystyle \angle A+\angle B+\angle C+\angle D=360^{\circ }.} This is a special case of the n-gon interior angle sum formula: (n − 2) × 180°. All non-self-crossing quadrilaterals tile the plane, by repeated rotation around the midpoints of their edges.