This video provides an electric presentation on sectors and arc lengths of circles. The presenter explains the key information needed to understand the topic, including the circumference and area formulas of a circle. The presentation...

Cartesian and polar coordinates are introduced and how to switch from one to the other is derived. The concept of angular displacement and arc length are demonstrated. Circumference is shown to be an arc length.

En las selvas tropicales, las plantas compiten por el espacio y las enredaderas crecen hasta los 900 m de longitud. Sin embargo, los peligros internos no son nada en comparación con las amenazas externas.
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Retired Supreme Court Justice Stephen Breyer discusses the unique dynamics and evolution of the court over time, the decision-making process and his legacy with Wall Street Journal Editor in Chief Matt Murray.

Hybrid work, so-called quiet quitting and a shifting labor market accelerated by the pandemic are the latest challenges that face leaders. Adam Grant, author of “Think Again," discusses how CEOs can improve productivity, creativity and...

MOT 1942: NEW GUINEA: WS Jungle open huts w/ indigenous people carrying stretcher in the rain. MS TRACKING Native indigenous peoples carrying wounded soldier on stretcher. Pacific Campaign, Pacific Front, WWII, World War II.

Everyone loses their temper from time to time — but the stakes are dizzyingly high when the focus of your fury is your own child. Clinical psychologist and renowned parenting whisperer Becky Kennedy is here to help. Not only does she...

👉 Learn how to graph quadratic equations by completing the square. A quadratic equation is an equation of the form y = ax^2 + bx + c, where a, b and c are constants. The graph of a quadratic equation is in the shape of a parabola which...

Empathy is a term we hear a lot, but what does it mean and how does it work? Looking back through art history, we find many moments when art has allowed us to share in the feelings of others, from Maya Lin's Vietnam Veterans Memorial, to...

MOT 1950: RUBBER TAPPING: COLOR: VS Liberian male worker adding anticoagulant to cup on rubber tree. MCU White latex dripping from incisions in tree bark into cup. Plantation, natural rubber trees, sap, Harbel, Liberia

Limnognathia maerski is one of the smallest known animals, yet has one of the most complicated jaw structures in the animal kingdom. It is currently the only species in phylum micrognathozoa that humans know about, however, there are...

👉 Learn the basics of graphing a tangent and a cotangent function. To plot the tangent and the cotangent graph we choose a set of points and form a table of values with which we plot the points on the x-y coordinate axis to obtain the...

In Part II of this 100 Lunar Days video series, we look at the significance of the Lunar Reconnaissance Orbiter being at the Moon for this period of time, and highlight some of the scientific accomplishments of the...

ExoMars 2016 is about to launch, and The Arecibo Observatory is picking up some mysterious signals this week on SciShow Space News!

👉 Learn how to solve problems with arc lengths. You will learn how to find the arc length of a sector, the angle of a sector, or the radius of a circle. An arc of a circle is the curve between a pair of points on the circumference of the...

In our previous video we tackled some of the bigger-picture questions such as "should I include a summary or statement?" and "is it ok to use a template?" Now we focus on constructing each individual section of a standard, chronological...

👉Learn how to solve a system (of equations) by elimination. A system of equations is a set of equations which are collectively satisfied by one solution of the variables. The elimination method of solving a system of equations involves...

SchoolOnline's Secondary Maths videos are brilliant, bite-size tutorial videos delivered by examiners. Ideal for ages 13-17, they cover every key topic and sub topic covered in GCSE Maths in clear and easy to follow...

Learn how to solve problems with arcs of a circle. An arc is a curve made by two points on the circumference of a circle. The measure of an arc corresponds to the central angle made by the two radii from the center of the circle to the...

Following the tragic events in Orlando earlier this month, there were many reports of gay men being turned away when they went to donate blood. Why do non-celibate gay men have their blood donations rejected? Turns out, it's an outdated...

Evaluate the six trigonometric functions given a right triangle

MOT 1937: VINTAGE 1917 EPHEMERA: Poster: Victor Records ad 'The Dixieland Jass Band' (note spelling variations of Jass album 75 cents) Billing poster: Eisenweber (Columbus Circle at 58th) first New York City venue. Music memorabilia.

In this video, learn about the important considerations when creating site links, how to use site links to increase performance, and how to assign site link prioritization.
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This clip is from the chapter "Managing and...

MOT 1948: U.S. POST OFFICE: MAILMAN: WS Mailman exiting post office. MS Letter carrier greeting children on street. VS Mailman delivering mail to 'Mrs. Louis' (SOT). MS Mailman stopping at mailbox. MS Opening box picking up letters. Mail...