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Using Sine to Calculate the Area of a Triangle
This video explains how to derive a formula for using sine to calculate the area of a triangle by using the standard formula for the area of a triangle. Using sine to calculate the area of a triangle means that we can find the area knowing only the measures of two sides and an angle of the triangle. There is no need to know the height of the triangle, only how to calculate using the sine function. (2:03)
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2.1 Industrial revolutions and technological change

In this section I shall look at the way that technological innovations in previous eras, such as the invention of electricity in the early 1900s, radically affected the way society organised production and at how these changes spurred general economic growth. In many instances, the changes were so large that they defined an entire period, just as the rise of information technologies has led some to call the current era the ‘information age’.

The way that technological change can fun
Author(s): The Open University

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5.6.1 Young adults

Activity 20

Look closely at Images 54 and 55. Can you identify the two features which distinguished a girl from a young woman in the Victorian and Edwardian period?


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9 Notes to help you complete your assessment

To complete your assessment portfolio you must include a contents page indicating how your reflective commentary in Part A and your evidence in Part B are related. An example of a suitable format for the contents page is in Figure 1 below.

Figure 1  (PDF, 1 page, 0.1MB)

Although the requirements of Parts A and B are listed sep
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Soil Line and Simple Ratio
Soil Line and Simple Ratio - UNSPECIFIED Keywords:UNSPECIFIED
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5.2.1 When to look at the question

At what stage do you look at the title of your next assignment?

Activity 8

Note down in your Learning Journal what you think are the advantages and disadvantages of looking at the title before and after starting to w
Author(s): The Open University

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1 Developing your problem solving skills

This Key Skill Assessment Course offers an opportunity for you to select and prepare work that demonstrates your key skills in the area of problem solving.

This course provides you with advice and information on how to go about presenting your key skills work as a portfolio.

In presenting work that demonstrates your key skills you are taking the initiative to show that you can develop and improve a particular set of skills, and are able to use your skills more generally in your s
Author(s): The Open University

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Keep on learning

Study another free course

There are more than 800 courses on OpenLearn for you to c
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An introduction to software development
Software development is the practice of organising the design and construction of software, the beating heart of much technology fundamental to our personal and professional life. This free introductory course, An introduction to software development, discusses the engineering nature of software development, its challenges and some fundamental practices which have developed to meet them. Software development is a fast-moving discipline and as a software development professional you must be
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Except for third party materials and otherwise stated (see http://www.open.ac.uk/conditions terms and conditions), this content is made available under a http://creativecommons.org/licenses/by-nc-sa/2

Using the Prepositions At, In, and On
This video contains a slide show which defines prepositions and prepositional phrases.  The video defines at, in, and on and shows examples of how to use them in sentences.  The video concludes with practice activities where students complete sentences with either at, in, or on. ( 4:50)
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Mediating Change: Culture and Climate Change
Every generation faces challenges that previous generations could scarcely imagine. Twenty years ago, few people were talking about climate change, now it's one of the most hotly-contested areas in politics. How do artists, writers, musicians and broadcasters respond when a new subject appears that is as large and significant as this? What kind of novels, plays, paintings, sculptures, movies and music begin to emerge? ‘Mediating Change’ is a four-part series, chaired by BBC Radio 4’s Que
Author(s): The iTunes U team

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Introduction

The core of this course is Chapter 9 of Teach Yourself Planets, by David Rothery, which is found in Section 1 of this course page by page, followed by a guided discussion and questions in Sections 2 through 4. Note that all references in Chapter 9 of Teach Yourself Planets to other chapters, are to other chapters of Teach Yourself Planets - these references are not to other sections of this course.

Jupiter is the first of the giant planets and has a large family of
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Introduction

The material presented here raises general themes of order and disorder, the way they are represented or signified, and the place of crime in these representations. The material is based upon an audio file, originally 29 minutes in length, and examines the problem of crime in relation to the city of Glasgow. It was recorded in 1999.

This OpenLearn course provides a sample of Level 2 study in Author(s): The Open University

1.2 Developing countries

Question

Which countries in the world are classified as ‘developing countries’?

There are various definitions of ‘developing countries’, none entirely satisfactory. The WTO allows
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5.1 The personal computer

Over the following screens you will look at three different examples of computers: a PC, which is obviously a computer, and a set of electronic kitchen scales and a digital camera, which are not so obviously computers. You will find that all three of these examples match with the functional block diagram of a computer given in Author(s): The Open University

Introduction

Polymers are materials composed of long molecular chains that are well-accepted for a wide variety of applications. This unit explores these materials in terms of their chemical composition, associated properties and processes of manufacture from petrochemicals. The unit also shows a range of products in which polymers are used and explains why they are chosen in preference to many conventional materials.

This OpenLearn course provides a sample of level 3 study in Author(s): The Open University

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2012 March 20 - Part 1

Recitation leader Prof. Liang Fu, substituting for Prof. Adams, goes over how to qualitatively analyze the energy eigenstates given a general potential and begins the quantitative analysis of the energy eigenstates of a finite well.


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2.4.3 Sulfur (S)

Most proteins contain about 1% sulfur, which occurs in the side-chains (R groups) of two of the protein-forming amino acids, methionine and cysteine.

Cysteine is particularly important in proteins such as collagen (found in bone, tendons, cartilage and skin) and keratin (found in hair and nails, as well as skin).

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Teenager Overcomes Reading Problem
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Chem 51B: Organic Chemistry (Van Vranken)

This version of Chem 51B was taught by Dave Van Vranken in Winter Quarter 2013.

Description: This is the second quarter of the organic chemistry series. Topics covered include: Fundamental concepts relating to carbon compounds with emphasis
Author(s): dlvanvra@uci.edu (David Van Vranken)

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