SAT Geometry & Trigonometry
Circles, triangles, volume, and right-triangle trigonometry.
SAT Geometry & Trigonometry accounts for ~15% of Math (5 to 7 questions). It tests circle equations, arc lengths, similar triangles, volume formulas, and right-triangle trigonometry (SOH-CAH-TOA).
Geometry and Trigonometry covers Euclidean geometry, coordinate circles, right triangles, and basic trigonometric identities like the complementary angle identity sin(x) = cos(90° - x).
In a right triangle, sin(3x - 10)° = cos(x + 20)°. What is the value of x?
Core Rules & Common Traps
| Rule / Concept | How It's Tested | The Trap to Avoid |
|---|---|---|
| Circle Equation & Center | (x - h)² + (y - k)² = r² has center at (h, k) and radius r = √constant. | Forgetting to take the square root of the right side to get radius r. |
| Complementary Angle Identity | sin(x°) = cos(90° - x°) for acute angles in a right triangle. | Failing to equate the two acute angle expressions when sin(A) = cos(B). |
What this domain covers
Strategy that actually works
Frequently asked questions
Are geometry formulas provided on the Digital SAT?
Yes, basic geometric formulas (area, volume, Pythagorean theorem, special right triangles) are available in the built-in Reference Sheet during the exam.
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Digital SAT Syllabus
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