Module 1 - Test 1 Flashcards
What is a Real number?
Has a point and can be plotted on a number line
What is an Integer?
Whole number and its opposite
What is a digit?
Numbers from which the numerals are made
What is a radical?
Involves a square root, cube root, etc of an integer
What is a variable?
A letter which stands for an unspecified number from a given set
What is an expression?
A collection of variables and constants connected by operation signs (+, -, x, /, etc)
What is an absolute value?
The difference between the number and zero on the number line. It’s denoted by two vertical lines | |
What are terms?
Numbers that are added to each other or subtracted from each other
What are factors?
Numbers that are multiplied together
In the expression x to the y, what is x?
The base
In the expression x to the y, what is y?
The exponent
What is the expression x to the y called?
A power
Solve a + b = c for b
b = c - a
Solve U + P =V for U
U = V - P
Solve 0.25 = n - 1 for n
n = 1.25
Solve f = 1 / D for D
D = 1 / f
Solve Prism = Lens Power x OC for Lens Power
Lens Power = Prism / OC
In a rectangular coordinate system, what is the x axis called?
Abscissa
In a rectangular coordinate system, what is the y axis called?
Ordinate
In a rectangular coordinate system, what are the two axes called?
Horizontal axis
Vertical axis
Both together are coordinate axes
What are the 4 regions of a rectangular coordinate system called?
Quadrants
What is the point of intersection between two axes called?
Origin
What is an ordered pair?
Two numbers corresponding to a single point on a graph
Calculate f(m) for a lens whose power is +3.00 D
f(m) = 1 / P(D) f(m) = 1 / 3.00 f(m) = 0.333 m = 33.3 cm
What are the metric system conversions for length?
1 m = 10 dm = 100 cm = 1000 mm
1 km = 1000 m
Solve 50 cm = _____ mm
50 cm x 1000 mm/100 cm = 500 mm
How many cm are in an inch?
2.54
How many inches are in a meter (m)?
39.37
How many yards are in a meter (m)?
1.09
Convert 20 ft to meters
20 ft x 12 in / 1 ft x 2.54 cm / 1 in x 1 m / 100 cm
= 6 m
How many grams are in a pound (lb)?
454
What geometric shape has 5 sides?
Pentagon
What geometric shape has 6 sides?
Hexagon
What geometric shape has 8 sides?
Octagon
What is an acute angle?
An angle measuring between 0 and 90 degrees
What is an obtuse angle?
An angle measuring more than 90 but less than 180 degrees
What is a right triangle?
An angle measuring exactly 90 degrees
What is a straight angle?
An angle measuring exactly 180 degrees
What is an isosceles triangle?
One with two equal congruent sides
What is an equilateral triangle?
One with all 3 sides of equal length and all 3 angles are 60 degrees
What is a scalene triangle?
One with all sides different lengths and all angles different degrees
What is an acute triangle?
One where each angle is less than 90 degrees
What is an obtuse triangle?
One where one angle is greater than 90 degrees
What lens is biconvex?
A converging lens
What lens is biconcave?
A diverging lens
What shape is a converging lens?
biconvex
What shape is a diverging lens?
biconcave
