Module 5 · Geometry and Measurement
Chapter 26: Coordinate Geometry
Geometry & Trigonometry
4 topics
What this chapter covers
The 4 topics below make up Coordinate Geometry on the Digital SAT. Click any topic to open its notes, examples and practice test.
Study material & tests
📚 Study this chapter
Notes, worked examples and hint-guided practice for every topic.
Start learning →
🎯 Topic tests
8 auto-graded questions per topic, pulled from the question bank.
Practice by topic →
📝 Chapter test
25 fresh mixed-difficulty questions, timed, with full solutions.
Take chapter test →
Formula Reference Sheet
This chapter
Two-point formulas
| Distance | √[(x₂ − x₁)² + (y₂ − y₁)²] |
|---|---|
| Midpoint | ((x₁ + x₂)/2, (y₁ + y₂)/2) |
| Slope | (y₂ − y₁)/(x₂ − x₁) |
Line relationships
| Parallel lines | equal slopes |
|---|---|
| Perpendicular lines | slopes are negative reciprocals |
| Horizontal / vertical | slope 0 / undefined |
Digital SAT reference
Area & Circumference
| Circle area | A = πr² |
|---|---|
| Circle circumference | C = 2πr |
| Rectangle | A = ℓw |
| Triangle | A = ½ b h |
Volume
| Rectangular box | V = ℓwh |
|---|---|
| Cylinder | V = πr²h |
| Sphere | V = 4⁄3 πr³ |
| Cone | V = 1⁄3 πr²h |
| Pyramid | V = 1⁄3 ℓwh |
Right triangles
| Pythagorean theorem | a² + b² = c² |
|---|---|
| 30°–60°–90° | sides x : x√3 : 2x |
| 45°–45°–90° | sides s : s : s√2 |
Constants
| Degrees in a circle | 360° |
|---|---|
| Radians in a circle | 2π |
| Angles of a triangle | sum = 180° |
🖩 Graphing Calculator