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

Coordinate Geometry Proofs - MathBitsNotebook(Geo)

Determining the Distance Between Two Parallel Lines

Triangle Proportionality Theorem (With Proof and Examples) - Owlcation

Lesson Explainer: Parallel Lines in a Triangle

Geometry of tetrahedron ABCD and foot E Let us introduce d ABC as the

Math Education Geometry Problem 1075: Quadrilateral, Right Triangle, 90 Degrees, Isosceles, Midpoint, Distance. Level: High School, College, Mathematics Education.

Using Coordinate Geometry to Prove that a Quadrilateral is a Parallelogram – GeoGebra

Distance Between Two Points - Formula, Derivation, Examples

Coordinate Geometry : Equation of a parallel line : ExamSolutions

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