Math Vocabulary
Natural/Counting numbers: 1, 2, 3, 4… (Positive numbers starting with one)
Whole numbers: 0, 1, 2, 3, 4…. (Positive numbers starting with zero)
Integers: ….-3, -2, -1, 0, 1, 2, 3, …. (Positive and negative whole numbers)
Rational Numbers: includes integers, decimals, fractions, etc.
Irrational Numbers: square roots, pi, etc
Real Numbers: Combination of all above categories
Prime Numbers: The only factors are 1 and itself (EX. 7, 11, 13, 19...etc)
Composite Numbers: Have more than 2 factors (EX 2, 4, 6, 8, 9, 10....)
Polygon: Polygons are 2-dimensional shapes. They are made of straight lines, and the shape is "closed" (all the lines connect up).
Quadrilateral: a polygon with 4 sides
Rectangle: 2 sets of parallel lines, 4 right angles Area: length x width
Parallelogram: 2 sets of parallel lines Area: base x height (right angle to base)
Square: 4 equal sides, 4 right angles Area: length x width OR side * side OR side squared
Rhombus: 4 equal sides Area: base x height (right angle to base)
Trapezoid: 1 set of parallel lines Area = (b1 + b2) / height / 2 OR
Composite figures: figures are figures that are made up of other figures
Acute Angle: less than 90*
Obtuse Angle: greater than 90*
Right Angle: equal to 90*
Acute triangle: ALL angles are less than 90*
Obtuse triangle: Contains an obtuse angle
Right triangle: Contains a right angle
Equilateral Triangle: All angles/sides are equal (60* each)
Isosceles Triangle: 2 angles/sides are equal
Scalene Triangle: No angles/sides are the same
Hypotenuse: The side opposite a right angle. Used to calculate Pythagorean Theorem
Some great videos to watch!
https://www.khanacademy.org/math/pre-algebra/fractions-pre-alg/number-sets-pre-alg/v/number-sets
https://www.youtube.com/watch?v=PXHp_PhUT4g
Natural/Counting numbers: 1, 2, 3, 4… (Positive numbers starting with one)
Whole numbers: 0, 1, 2, 3, 4…. (Positive numbers starting with zero)
Integers: ….-3, -2, -1, 0, 1, 2, 3, …. (Positive and negative whole numbers)
Rational Numbers: includes integers, decimals, fractions, etc.
Irrational Numbers: square roots, pi, etc
Real Numbers: Combination of all above categories
Prime Numbers: The only factors are 1 and itself (EX. 7, 11, 13, 19...etc)
Composite Numbers: Have more than 2 factors (EX 2, 4, 6, 8, 9, 10....)
Polygon: Polygons are 2-dimensional shapes. They are made of straight lines, and the shape is "closed" (all the lines connect up).
Quadrilateral: a polygon with 4 sides
Rectangle: 2 sets of parallel lines, 4 right angles Area: length x width
Parallelogram: 2 sets of parallel lines Area: base x height (right angle to base)
Square: 4 equal sides, 4 right angles Area: length x width OR side * side OR side squared
Rhombus: 4 equal sides Area: base x height (right angle to base)
Trapezoid: 1 set of parallel lines Area = (b1 + b2) / height / 2 OR
Composite figures: figures are figures that are made up of other figures
Acute Angle: less than 90*
Obtuse Angle: greater than 90*
Right Angle: equal to 90*
Acute triangle: ALL angles are less than 90*
Obtuse triangle: Contains an obtuse angle
Right triangle: Contains a right angle
Equilateral Triangle: All angles/sides are equal (60* each)
Isosceles Triangle: 2 angles/sides are equal
Scalene Triangle: No angles/sides are the same
Hypotenuse: The side opposite a right angle. Used to calculate Pythagorean Theorem
Some great videos to watch!
https://www.khanacademy.org/math/pre-algebra/fractions-pre-alg/number-sets-pre-alg/v/number-sets
https://www.youtube.com/watch?v=PXHp_PhUT4g