Chapter 8 vocabulary
What is a ratio?
A quotient of two numbers.
What is angle of depression?
Angle of depression is the angle between a downward line of sight and the horizontal.
3/x = 7/14
Simplify √ 48
4√ 3
What is the pythagorean triple?
a2+b2=c2
What is a proportion?
A proportion is an equation stating that two or more ratios are equal.
What is angle elevation?
Angle elevation is the angle between an upward line of sight and the horizontal.
Find the fourth proportional for each set of three terms.
1/2, 3, 4
x=24
Simplify √72 + √75 - √48
3√11
Solve 52+ y2= 72
x= 11* 2√6 = 22√6
What is arithmetic mean?
Arithmetic mean is the average of a set of numerical values, calculated by adding them together and dividing by the number of terms in the set.
What is a diagonal?
A diagonal is a segment whoes endpoints are vertices not in the same face of a rectangular solid.
4/x = x/16
x= +/- 8
x2 -5x -6 = 0
{6, -1}
Find the fourth term 6, 12, 16
x=8
What is a geometric mean?
A geometric mean is the means in a proportion aer equal.
What is face?
Face is one of the polygonal surfaces making up a polyhedron.
Find the ratio of x to y if 2x = 3y
x/y = 3/2
Solve 7/ x+1 = 2x+4/ 3x-3 for x.
{5/2, 5}
Solve the proportion 7/x-4 = 3/5
47/3
The slope of a line is the ratio of the ____ between any two points on the line to the ___ between the two points.
The slope of a line is the ratio of the rise between any two points on the line to the run between the two points.
What is rectangular solid?
Rectangular solid is a prism with six rectangle faces.
If x(a=b) = y (c+d)
c+d/a+b
32+x2=42
x=√7
√6+x=36
√43