GRADE 10 MATH

angle of elevation

angle measured above the horizontal also called the angle of inclination

angle of depression

angle measured below the horizontal also called the angle of declination

Perfect square trinomial

A trinomial of the form a^2+2ab+b^2 or a^2-2ab+b^2 that is the result of squaring a binomial.

point of intersection

a point where two lines Cross a point that is common to both lines

quadratic relation

a relation whose equation is in the form 2 bx c, where y ax a, b, and c are real numbers

quadratic relation

a relation whose equation is in the form y =ax2+bx+c, where a, b, and c are real numbers and a =/0

quadratic expression

a second-degree polynomial

difference of squares

an expression of the form a^2 -b^2 that involves the subtraction of two squares

equidistant

equally distant

equivalent linear equations

equations that have the same graph

altitude

height of a geometric shape

equivalent linear systems

pairs of linear equations that have the same point of intersection

midpoint

point that divides a line segment into two equal line segments

primary trigonometric ratios

sine, cosine, and tangent often abbreviated as sin, cos, and tan

method of elimination

solving a linear system by adding or subtracting to eliminate one of the variables

method of substitution

solving a linear system by substituting for one variable from one equation into the other equation

parabola

the graph of a quadratic relation, which is U-shaped and symmetrical

axis of symmetry

the line that divides a figure into two congruent parts

right bisector

the line that passes through the midpoint of a line segment and intersects it at a 90° angle

vertex

the point on a parabola where the curve changes direction the maximum point if the parabola opens down the minimum point if the parabola opens up

cosine law

the relationship between the cosine of an angle and the lengths of the three sides in any acute

sine law

the relationship between the sides and their opposite angles in any acute

root (of an equation)

the value of the variable that makes an equation true the same as the solution of an equation

Linear system

two or more linear equations that are considered at the same time

Zero

a value of x for which a relation has a value of 0 corresponds to an x intercept of the graph of the relation