👉 Learn how to solve problems with rectangles. A rectangle is a parallelogram with each of the angles a right angle. Some of the properties of rectangles are: each pair of opposite sides are equal, each pair of opposite sides are...

👉 Learn how to solve problems with parallelograms. A parallelogram is a four-sided shape (quadrilateral) such that each pair of opposite sides are parallel and are equal. Some of the properties of parallelograms are: each pair of...

In November, 2013, a massive typhoon hit the Philippines and other countries in Southeast Asia. Learn about the social, financial, and environmental damage Typhoon Haiyan caused.

In this video, the teacher explains how to prove or disprove that four points in a coordinate plane make up a rectangle. They review different ways to classify quadrilaterals and then demonstrate how to prove that a shape is a...

The Scala programming language has gained a lot of traction in the last couple of years because of its functional orientation and conciseness. The industry has a strong interest in using Scala in modern production systems, and as...

In this video, the teacher explains how to prove the formula for calculating the area of a circle using a visual demonstration. By dissecting and rearranging the circle into smaller slices, the teacher shows how the formula, area equals...

In this video, the teacher explains how to use congruent triangle criteria to prove other things. They provide an example of proving that the diagonals of a rhombus bisect its angles using a two-column proof. By demonstrating the...

Julian has spent his entire working career working in information technology and turning ideas into software services or businesses at Apple, AT&T Unisource, the UK Government and as the founder of his own Internet software...

Animal expert, Coyote Peterson, bravely jumps from his kayak for an EPIC snapping turtle catch! Filmed using GoPros and other extreme cameras this visual experience is about as close as it gets to catching one of these giant predatory...

In this video, the teacher explains how to prove the properties of diagonals within parallelograms using parallel lines and triangle congruence theorems. They demonstrate the process through two examples: proving that the diagonals of a...

In this video, we will prove 4 theorems. 1. Diagonals of parallelogram bisect each other. 2. Diagonal of parallelogram divides it into two congruent triangles. 3. Opposite sides of parallelogram are equal,. 4. Opposite angles of...

This video shows the use of vector theory to work out the coordinates of points on a parallelogram. It also shows how to use a vector method to prove that points on a parallelogram form a straight line. Source of question: IGCSE A June...

New Zealand’s small-rocket specialist is opening a second launch site in the US, and will start to challenge SpaceX in the construction and launching of large, reusable rockets.

This video explains how to prove that two figures are congruent even after undergoing multiple transformations such as translations, rotations, and reflections. By demonstrating the correct sequence of transformations and examining...

👉 Learn how to evaluate the tangent of an angle in degrees using the sum/difference formulas. To do this, we first express the given angle as a sum or a difference of two (easy to evaluate) angles, then we use the unit circle and the...

👉 Learn how to find the complement and the supplement of a given angle. Two angles are said to be complementary if they add up to 90 degrees (pi/2 in radians) and are said to be supplementary if they add up to 180 degrees (pi in...

MOT 1948: ATHENS CITY: HA XWS Athens City, mountains BG. VS Crowded Square (possibly Syntagma Square), pedestrians, people at tables. VS Families at tables, reading newspaper, elderly men sitting in outdoor cafe. Lifestyle, Greece

Earlier this week we've started seeing articles noting that oil prices have now gone into the negatives (meaning investors are paying to give away their oil). What is going on here? How does this make sense? As always with these...

The first floating liquefied natural gas project is set to go into operation in 2015. The natural gas extraction unit, known as PETRONAS Floating LNG1, or PFLNG1, will be located in Malaysia, roughly 180 kilometers off the coast of...