Algebra 1 - lessons 1-4 Flashcards
What is a mixed number?
The sum of a whole number and a fraction
What is a mathematical line?
A straight line with no width or ends
What is a line segment?
A part of a line
When 2 lines cross, they…?
Intersect
What is the point where the 2 lines intersect called?
Point of intersection
What do we call 2 lines that are in the same plane and don’t intersect?
Parallel lines
What are the lines that make square corners at the intersection point called?
Perpendicular lines
What are the angles made by perpendicular lines called?
Right angles
What do 2 right angles form?
A straight angle.
What is an angle smaller than a right angle called?
Acute angle
What is an angle larger than a right angle called?
Obtuse angle
What is a polygon?
Simple, closed, flat geometric figure whose sides are line segments
A polygon’s sides are always equal to the number of its…?
Vertices
What do you call a polygon with an indentation?
Concave polygon
What do you call a polygon without an indentation?
Convex polygon
What do you call a polygon whose sides all have the same length?
Equilateral polygon
What do you call a polygon whose angles all have the same measure?
Equiangular polygon
What do you call polygons in which both all sides have the same length and all angles have the same measure?
Regular polygon
What are tick marks used for?
They show which sides have equal length and which angles have equal measure
How many degrees do all three-angled triangles have when the angles add up?
180 degrees
What do you call a triangle with a right angle?
Right triangle
What do you call a triangle with each of its angles being less than 90 degrees?
Acute triangle
What do you call a triangle with an angle that’s more than 90 degrees?
Obtuse triangle
What do you call a triangle with all of its angles having equal measure?
Equiangular triangle
What do you call a triangle with 2 sides of equal length?
Isosceles triangle
What do you call a triangle where all its sides have equal length?
Equilateral triangle
What do you call a triangle where each of its sides have a different length?
Scalene triangle
In any triangle, the angles opposite sides of equal lengths have equal measures, and vice versa; true or false?
True
What do the three angles in any triangle equal when added together?
180 degrees
What do you call a quadrilateral that has 2 pairs of parallel sides?
Parallelogram
What do you call a quadrilateral that has exactly 2 parallel sides?
Trapezoid
What do you call a parallelogram with 4 right angles?
Rectangle
What do you call an equilateral parallelogram?
Rhombus
What do you call a rhombus with 4 right angles?
Square
What does perimeter mean?
The measure/distance around
What do you call the point on a circle that equals the same distance from the circle’s center?
Radius
What do you call the thing that is twice the length of the radius of a circle?
Diameter
What do you call a circle’s perimeter?
Circumference
What is an example of an irrational number?
Pi (3.14)
A number is an idea; true or false?
True
The value of a numeral is the number represented by that numeral; true or false?
True
What do we call the numbers that we use to count objects/things?
Natural/counting numbers
What do we call any number that can be used to describe a physical distance greater than 0?
Positive real number
0 is a positive number; true or false?
False
0 is a real number; true or false?
True
All positive real numbers don’t have negative counterparts; true or false?
False
What do we call positive numbers’ negative counterparts?
Negative real numbers
Is a numeral with no sign positive or negative?
Positive
Negative numbers and positive numbers are also known as ____ numbers
Signed
What is the base point of a number line associated with 0 called?
Origin
What does it mean to place a dot on a number line and have it indicate the location of a number?
Graph a number
The dot is the _____ of the _____ (on a number line)
Graph, number
A number is the _____ of the _____ (on a number line)
Coordinate, point
How can we tell if one number’s graph is greater than another number’s graph (on a number line)?
Whichever is furthest on the right
What is the term for both the numbers being added together and the result of those numbers being added together?
Addend, sum
When subtracting one number from another, what is the first number called, the second number called, and the result called?
Minuend, subtrahend, difference
What is the term for both the numbers being multiplied together and the result of those numbers being multiplied together?
Factor, product
When dividing numbers, what do we call the first number, the second number, and the result?
Dividend, divisor, quotient
What are unit multipliers?
Numbers with units being multiplied together that can change the units of numbers
How many ft = 1yd?
3 ft
How many in = 1 ft?
12 in
How many ft = 1 mile?
5280 ft
How many cm = 1 in?
2.54 cm
How man cm = 1 m?
100 cm
How many mm = 1 cm?
10 mm
How many m = 1 km?
1000 m
