math 112 b 02/24/2016 - 02/29/2016
math 112 b 02/24/2016 - 02/29/2016 Math 112b Sec 004
Popular in elementary mathmatics
Popular in Mathmatics
This 2 page Class Notes was uploaded by amber weiss on Monday February 29, 2016. The Class Notes belongs to Math 112b Sec 004 at Southern Illinois University Edwardsville taught by cheryl eames in Spring 2016. Since its upload, it has received 24 views. For similar materials see elementary mathmatics in Mathmatics at Southern Illinois University Edwardsville.
Reviews for math 112 b 02/24/2016 - 02/29/2016
Report this Material
What is Karma?
Karma is the currency of StudySoup.
You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!
Date Created: 02/29/16
Chapter 9 Section 3 SNOW DAY PRESENTATION 02/24/2016 Chapter 9 Section 3 Terminology: Space- is an undefined term (like point, line and plane) Dihedral angle- angle formed when 2 planes meet Parallel- if the line doesn’t intersect the plane Perpendicular- if the line if intersects and is perpendicular to EVERY point in plane Two planes are parallel if they do not intersect Two planes are perpendicular if dihedral angle measures 90 degrees Polyhedral- figures in space whose sides are polygonal regions Faces- polygonal regions or sides Edges- 2 faces intersect Vertices- 3 or more faces intersect Tetrahedron- 4 triangles for faces Cube- 6 square faces Octahedron- with 8 triangular faces Dodecahedron- 12 pentagon faces Icosahedron- 20 triangular faces Semiregular polyhedral- polyhedral whose faces are 2 or more regular polygons with the same arrangement of polygons around each vertex Pyramid- polyhedron with a polygon base and triangles as sides Right pyramid- pyramid whose sides are all isosceles triangles Prism- polyhedron with 2 parallel and congruent bases Cone- circular base and a lateral surface that slopes to the vertex Cylinder- 2 parallel circular bases of same size and a lateral surface that joins to bases Net- 2 dimensional pattern for a three dimensional figure Name Faces Vertices edges Triangular prism 5 6 9 Triangular pyramid 4 4 6 Cube 6 8 12 Square pyramid 5 5 8 Hexagonal prism 8 12 18 Hexagonal pyramid 7 7 12 octahedron 8 6 12 Euler’s Formula- FACES + VERTICES = (E+2) add 2 more edges The worked out solutions are already given to us on blackboard in the notes!!! DOWLOAD THEM Chapter 9 Section 4 02/29/2016 Chapter 9 Section 4 Terminology: Reflection symmetry- when it is folded in half on a line of symmetry Line of symmetry- 2 images are congruent and line up on top of each other (mirror/reflection) Rotation symmetry- if it can be turned about a point less than 360 degrees and coincide with itself
Are you sure you want to buy this material for
You're already Subscribed!
Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'