geometry - Coordinates of parallel triangle with a distance of 'd

I have a triangle with Co-ordinates $\{(x_1,y_1),(x_2,y_2),(x_3,y_3)\}$. I need to find co-ordinates of a triangle,whose edges are exactly $\alpha$ distance from previous triangle. Below is the fig

Calculating Distance formula Coordinate geometry – GeoGebra

Math Education Geometry Problem 854: Triangle, Parallel lines, Parallelogram, Areas, Similarity, Concurrent lines. Sketch and typography, iPad Apps. Level: School, College, Mathematics Education. Distance learning.

The Distance Formula

Coordinate Geometry : Equation of a parallel line : ExamSolutions

Coordinate Geometry, PDF, Geometry

3 Ways to Calculate Angles - wikiHow

Equation of a Line in 3D: Cartesian and Vector Form

3 Ways to Figure out if Two Lines Are Parallel - wikiHow

How to show that the quadrilateral with vertices at A (-9,-1), B (-5,-3), C(5,7) and D (3,11) is an isosceles trapezoid - Quora

Geometry Problem 1519: Discover the Length of a Segment in a Parallelogram using Midpoints and Parallel Lines, Thematic Poem. Difficulty Level: High School.

Distance Formula - Derivation, Examples

Prove that if a line is drawn parallel to one side of a triangle

3 D Geometry, Lecture 6, Coplanar lines, Point of intersection, Skew lines