Vocabulary
Right angle
The distance around the outside edge of a circle
Circumference
A triangle with one 90-degree angle
Right triangle
A system of measurement that uses a base-10 system to make conversions easier
Metric system
The result of multiplying a number times itself
x2
The total distance around the outside edge of a flat space
perimeter
A straight line that goes through the center of a circle and touches opposite sides of it
diameter
The longest side of a triangle with a 90-degree angle
Any shape with 4 straight sides
quadrilateral
A number that you can multiply times itself to get the number you want
square root
The number of squares needed to cover a surface
area
Radius
The 2 shorter sides on a triangle with a 90-degree angle
legs
any shape made of straight line segments where each segment meets exactly 2 others
polygon
The length of one side of a square with area x
square root of x
A measurement of how much space a 3-dimensional object takes up
volume
A number connecting the diameter of a circle to its circumference
Pi or 3.14
A triangle with 3 equal sides
Equilateral
How we describe 2 different 2-dimensional images that have the same shape but different sizes
Similar
The result of multiplying a number times itself 3 times (x)(x)(x)
x3
The amount of mass per unit of volume
Density
sphere
The relationship between the lengths of the 3 sides of a right triangle
(name or equation)
Pythagorean Theorem
a2 + b2 = c2
A number used to multiply the lengths of a figure to enlarge or shrink the image without changing its shape
scale factor
The length of one side of a cube whose volume is x
the cube root of x