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The images show the principles of a linear and a polar planimeter. The pointer M at one end of the planimeter follows the contour C of the surface S to be measured. For the linear planimeter the movement of the "elbow" E is restricted to the y-axis. For the polar planimeter the "elbow" is connected to an arm with its other endpoint O at a fixed ...
The dot planimeter differs from other types of planimeter, which measure the area of a shape by passing a device around its boundary. [ 5 ] The Steinhaus longimeter is a similar transparency-based device for estimating the length of curves by counting crossings.
To measure planimetrics a planimeter or dot planimeter is used. This rather advanced analog technology is being taken over by simple image measurement software tools like, ImageJ, Adobe Acrobat, Google Earth Pro, Gimp, Photoshop and KLONK Image Measurement which can help do this kind of work from digitalized images.
Whyville received awards in 2006, 2007, and 2008 from iParenting as the best website for kids, and the best on the web for its safety features. [4] In 2008 Whyville received a NAPPA (National Parenting Publication Award) Gold Award as a site that represented the best in its genre for kids [5]
It is a transparent sheet of three grids, turned against each other by 30 degrees, each consisting of parallel lines spaced at equal distances 3.82 mm.The measurement is done by counting crossings of the curve with grid lines.
Funbrain is a website with no interaction with other players, limiting conversation and other adverse conditions of chatting. The site has been KidSafe certified. [citation needed] CommonSense Media rates the site as appropriate for kids ages 7+ based on parent and child reviews. [11] Funbrain does have both banner and popup ads.
ABCya.com was founded in 1996 by Alan Tortolani. [2] A public school teacher, Tortolani created his own activities for his students. Later, he decided to register a domain under ABCya.com. Tortolani chose this particular domain name "ABCya" to make it accessible to children and easy to type into a web browser.
The planimeter was a manual instrument to calculate the area of a closed figure by tracing over it with a mechanical linkage. A slide rule. The sliding central slip is set to 1.3, the cursor to 2.0 and points to the multiplied result of 2.6. The slide rule was invented around 1620–1630, shortly after the publication of the concept of the ...