Spherical trigonometry | Types of polygons
Pentagramma mirificum (Latin for miraculous pentagram) is a star polygon on a sphere, composed of five great circle arcs, all of whose internal angles are right angles. This shape was described by John Napier in his 1614 book Mirifici Logarithmorum Canonis Descriptio (Description of the Admirable Table of Logarithms) along with rules that link the values of trigonometric functions of five parts of a right spherical triangle (two angles and three sides). The properties of pentagramma mirificum were studied, among others, by Carl Friedrich Gauss. (Wikipedia).
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Syphilis is another infection that is typically caused by sexual contact, thanks to the pathogen Treponema pallidum. What does this bacterium do? How is the infection treated? Let's take a closer look now. Script by Kellie Vinal Watch the whole Microbiology playlist: http://bit.ly/ProfDa
From playlist Microbiology/Infectious Diseases
What's a Pentagram? Geometry Terms and Definitions
Learn the mathematical name for this famous shape. Geometer: Louise McCartney Artwork: Kelly Vivanco Director: Michael Harrison Written & Produced by Kimberly Hatch Harrison and Michael Harrison ♦♦♦♦♦♦♦♦♦♦ Ways to support our channel: ► Join our Patreon : https://www.patreon.com/socr
From playlist Socratica: The Geometry Glossary Series
Poliomyelitis is a disease caused by the poliovirus, which has the ability to infect motor neurons in the spinal cord and cause paralysis. American President Franklin Roosevelt was famously crippled by polio. The poliovirus exists in a few different serotypes, which belong to the genus ent
From playlist Microbiology/Infectious Diseases
LANTHANIDES - a quick definition
A quick definition of the lanthanides. Chem Fairy: Louise McCartney Director: Michael Harrison Written and Produced by Kimberly Hatch Harrison ♦♦♦♦♦♦♦♦♦♦ Ways to support our channel: ► Join our Patreon : https://www.patreon.com/socratica ► Make a one-time PayPal donation: https://ww
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Whooping Cough: Bordetella pertussis
Whooping cough, caused by Bordetella pertussis, is a baby killer. It goes all the way back to the middle ages, so let's get a closer look at this bacterium now. Script by Kellie Vinal Watch the whole Microbiology playlist: http://bit.ly/ProfDaveMicrobio General Chemistry Tutorials: http
From playlist Microbiology/Infectious Diseases
If you're above a certain age, you've heard of the measles. This is a particularly nasty viral infection that used to be incredibly common, though is now largely eradicated thanks to vaccinations. Although, anti-vaccine sentiment has caused a slight resurgence in cases. What is this virus
From playlist Microbiology/Infectious Diseases
We just learned about gymnosperms, and the incredible evolutionary advantages they had over their ancestors. But the next leap forward for plants was even more impressive. Angiosperms are flowering plants, so any plant with flowers or fruits is an angiosperm. And instead of fertilizing by
From playlist Botany
Multidrug-Resistant Tuberculosis (MDR-TB): Mycobacterium tuberculosis
What is tuberculosis? Just like the rest of these diseases, it's caused by a bacterium, specifically Mycobacterium tuberculosis. This one is tricky because there are strains that are becoming increasingly resistant to antibiotics, so let's learn what we can about these fellas, so that we c
From playlist Microbiology/Infectious Diseases
These Microbes Hunt and Paralyze Their Prey
To learn more about the eating habits of microorganisms, check out the full video here: https://youtu.be/io731XY8fH8 Shop The Microcosmos: https://www.microcosmos.store Follow Journey to the Microcosmos: Twitter: https://twitter.com/journeytomicro Facebook: https://www.facebook.com/Journ
From playlist Microcosmos Shorts