SAT Math · Study & Practice
Quadrilaterals
A quadrilateral is any four-sided polygon, and the SAT focuses on the special ones — parallelograms, rectangles, squares, rhombuses and trapezoids. This chapter covers their properties and angle rules. Read each topic, work the problems with the hint ladder, then take the 8-question topic test.
Topics
1
Parallelograms
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2
Rectangles
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3
Squares
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4
Rhombuses
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5
Trapezoids
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Chapter test
Formula Reference Sheet
This chapter
Angles & sides
| Angle sum | the four angles add to 360° |
|---|---|
| Parallelogram opposite angles | equal |
| Parallelogram adjacent angles | supplementary (sum 180°) |
Measures
| Rectangle perimeter | 2(length + width) |
|---|---|
| Square diagonal | side × √2 |
| Trapezoid area | ½(b₁ + b₂) × height |
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° |
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