Geometry Unit 9 Cheat Sheet
by Celia (CCRoses) via cheatography.com/118676/cs/22580/
Theorems & Postulates
area addition
postulate
the area of a region is equal to the sum of the are as
of its nonoverlapping parts
Formulas
area of a parallelogram area = bh
area of a triangle area = 1/2bh
area of a trapezoid area = [(b1 + b2)h]/2
area of a rhombus or kite area = 1/2d1d2
volume of a triangular prism volume = base * height
volume of a rectangular prism volume = length width height
volume of a cube volume = edge length
volume of a cylinder volume = area of the base * height
Vocabulary
composite
figure
a figure made up of simple shapes, such as trian gles,
rectangles, trapezoids, and circles
face the flat surfaces of a 3D solid
edge a segment that is the intersection of two faces
vertex a point of intersection of three or more faces
prism formed by two parallel congruent polygonal fac es called
bases connected by faces that are parallelograms
cylinder formed by two parallel congruent circular base s and a
curved surface that connects the bases
pyramid formed by a polygonal base and triangular faces that
meet at a common vertex
cone formed by a circular base and a curved surface that
connects the base to a vertex
cube a prism with six square fa ces
net a diagram of the surfaces of a 3D figure that can be
folded to form the 3D figure
cross
section
the intersection of a 3D figure and a plane
Vocabulary (cont)
volume the number of nonoverlapping unit cubes of a given size
that will exactly fill the interior
By Celia (CCRoses)
cheatography.com/ccroses/
Published 18th May, 2020.
Last updated 6th May, 2020.
Page 1 of 1.
Sponsored by Readable.com
Measure your website readability!
https://readable.com
3
