Core geometry formulas and terms tested on the ISEE and SSAT quantitative sections. Front: the term or formula. Back: definition or formula with a brief usage note.
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- Rectangle perimeter formula
- P = 2l + 2w, where l is length and w is width
- Rectangle area formula
- A = l x w, where l is length and w is width
- Triangle area formula
- A = (1/2) x b x h, where b is base and h is height
- Square area formula
- A = s^2, where s is the side length
- Circle circumference formula
- C = 2πr or C = πd, where r is radius and d is diameter
- Circle area formula
- A = πr^2, where r is radius
- Parallelogram area formula
- A = b x h, where b is base and h is height
- Trapezoid area formula
- A = (1/2) x (b1 + b2) x h, where b1 and b2 are the parallel bases and h is height
- Rectangular prism volume formula
- V = l x w x h, where l is length, w is width, and h is height
- Cube volume formula
- V = s^3, where s is the side length
- Cylinder volume formula
- V = πr^2h, where r is radius and h is height
- Sphere volume formula
- V = (4/3)πr^3, where r is radius
- What is an acute angle?
- An angle that measures less than 90 degrees
- What is a right angle?
- An angle that measures exactly 90 degrees, often marked with a small square
- What is an obtuse angle?
- An angle that measures more than 90 degrees but less than 180 degrees