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