PSAT Math Prep
Area = (√3÷4) × (side²) - Correct Answers-Equilateral Triangle
Side Ratio: 1:1:√2 - Correct Answers-Right Isosceles Triangle
Side Ratio: 1:√3: 2 - Correct Answers-30-60-90 Right Triangle
Union of Set A and Set B: (combination; no repetitions) - Correct Answers-A∪B
Intersection of Set A and Set B (members common to both sets) - Correct Answers-A∩B
a*n* = a₁(rⁿ⁻¹) - Correct Answers-Exponential growth formula
r - Correct Answers-ratio between consecutive terms
a₁ - Correct Answers-first term of set
a*n* - Correct Answers-*nth* term of set
x²-y² (Conjugate binomials) - Correct Answers-(x+y)(x-y)
x²-2xy+y² - Correct Answers-(x-y)(x-y)
x²+2xy+y² - Correct Answers-(x+y)(x+y)
y=kx (k is a nonzero constant) - Correct Answers-Direct variation
y = k/x (k is a nonzero constant) - Correct Answers-Inverse variation
⁴√x³ - Correct Answers-x¾
1/xⁿ - Correct Answers-x⁻ⁿ
tangent - Correct Answers-When a line is _______ to a circle, the radius of the circle is
perpendicular to the line at the point of contact
(x₁ + x₂)/2 - Correct Answers-midpoint formula
Area = (√3÷4) × (side²) - Correct Answers-Equilateral Triangle
Side Ratio: 1:1:√2 - Correct Answers-Right Isosceles Triangle
Side Ratio: 1:√3: 2 - Correct Answers-30-60-90 Right Triangle
Union of Set A and Set B: (combination; no repetitions) - Correct Answers-A∪B
Intersection of Set A and Set B (members common to both sets) - Correct Answers-A∩B
a*n* = a₁(rⁿ⁻¹) - Correct Answers-Exponential growth formula
r - Correct Answers-ratio between consecutive terms
a₁ - Correct Answers-first term of set
a*n* - Correct Answers-*nth* term of set
x²-y² (Conjugate binomials) - Correct Answers-(x+y)(x-y)
x²-2xy+y² - Correct Answers-(x-y)(x-y)
x²+2xy+y² - Correct Answers-(x+y)(x+y)
y=kx (k is a nonzero constant) - Correct Answers-Direct variation
y = k/x (k is a nonzero constant) - Correct Answers-Inverse variation
⁴√x³ - Correct Answers-x¾
1/xⁿ - Correct Answers-x⁻ⁿ
tangent - Correct Answers-When a line is _______ to a circle, the radius of the circle is
perpendicular to the line at the point of contact
(x₁ + x₂)/2 - Correct Answers-midpoint formula
