What’s on the Coordinate Proofs poster
The rule, 4 worked examples.
- Place a figure on the coordinate plane and use the distance and slope formulas to pro…
- d = √[(Δx)² + (Δy)²] · m = Δy/Δx
- Prove a parallelogram = opposite slopes equal
- Prove a rectangle = add: adjacent slopes × = −1
- Prove a rhombus = all four distances equal
- Prove isosceles = two distances equal
Place the figure with a vertex at the origin and a side on an axis. It makes the algebra much lighter.
Questions about the Coordinate Proofs poster
- What’s on the Coordinate Proofs poster?
- The rule, 4 worked examples. Place a figure on the coordinate plane and use the distance and slope formulas to pro…; d = √[(Δx)² + (Δy)²] · m = Δy/Δx; Prove a parallelogram = opposite slopes equal; Prove a rectangle = add: adjacent slopes × = −1; Prove a rhombus = all four distances equal; Prove isosceles = two distances equal. Place the figure with a vertex at the origin and a side on an axis. It makes the algebra much lighter.
- Who is the Coordinate Proofs poster for?
- Coordinate Proofs is filed under 10th Grade (ages 15–16), so it matches what that year asks a child to remember. It is equally useful to an older student revisiting math, and to the parent or teacher answering the question at the kitchen table.
- When should you use the Coordinate Proofs poster?
- Distance for sides, slope for angles. Those two tools prove everything at this level. A wall chart earns its place by being glanceable from where the work is happening, so Coordinate Proofs belongs on the wall where that math work actually happens, within glancing distance, rather than filed away.
- What other posters go with Coordinate Proofs?
- Circle Theorems, Angles in Polygons and Sequences and Series sit alongside Coordinate Proofs in the 10th Grade set. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Circle TheoremsAngles in PolygonsSequences and Series
- Is the Coordinate Proofs poster free to download and print?
- Yes. Coordinate Proofs downloads as a free PDF with no account, no email and no watermark, like everything else in the 10th Grade set. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Coordinate Proofs poster print at?
- Coordinate Proofs is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Coordinate Proofs loses nothing.Printing guide
Related posters
Charts that sit alongside Coordinate Proofs on the same wall.
Browse every 10th Grade poster, or start from the full catalogue.