SketchAndCalc™ is both a web application accessible from http://www.sketchandcalc.com and iOS mobile app used to calculate the area and perimeter of both regular and irregular polygon shapes.

Tracing over imported images or Google maps allows users to calculate the square areas and perimeters of floor plans, building plots, or parcels of land. Importing an image to trace over extends it's usefulness to landscape gardeners, building contractors, surveyors or home improvement enthusiasts who have a digital image to work from.

Simply import the image onto the drawing canvas and begin tracing the schematic, plan or irregular shape until the polygon is closed. At which point the application accurately returns the perimeter and area of the shape in both imperial (IP) measurements; square inches (sq in) square feet (sq ft) square yards (sq yd) square miles (sq mi). As well as metric (SI) measurements; square centimeters (sq cm), square meters (sq m), square kilometers (sq km). Professionals who wish to save and share calculations for later editing can do so.

The drawing canvas scale can be adjusted to accommodate very large areas such as the floorplan of a building, or the square meters area of a kitchen work surface.

Using your cursor, draw the shape of any object. Line lengths are displayed below the cursor to ensure measurements are accurate. And they can be adjusted after the shape is complete. The area and perimeter results are then displayed.

Functionality between the browser app and the mobile app is similar, with the exception of drawing gestures which must be adapted to a touch screen interface. However, both apps present line lengths as you draw to ensure the shapes scale matches that of the object to be calculated.

The SketchAndCalc mobile App for iOS also supports importation of .PDF image files to trace over. PDF files that contain multiple pages require an image browser to allow the user to select the page before importing.

Features Include:

• Select a drawing scale in feet, inches, meters or centimeters

• Import .JPG .GIF and multipage .PDF's

• Snap to grid On / Off

• Edit lengths with numeric keypad

• Edit vertex with double tap

• Re-establish vertex with double tap

• Dropbox integration

• Undo last line / vertex move

• Pinch to Zoom in / out

• Shake to clear canvas

• Panning the canvas

• Save calculations to file system for later editing or review

• Share a calculations image and XY coordinates via email

• Display a table of saved calculations XY coordinates

• Delete saved calculations

• Snap to grid On / Off

• Edit line lengths with Numeric keypad

• Pinch to Zoom In / Out

Download from iTunes:

http://itunes.apple.com/us/app/sketchandcalc/id449506634?ls=1&mt=8#

Blog

http://sketchandcalc.tumblr.com/

YouTube Channel

http://www.youtube.com/user/sketchandcalc

So your searching the internet for an easy way to calculate the area of a triangle, or perhaps you need a volume calculator. With SketchAndCalc™ you simply draw the desired shape and the area is displayed. If a volume calculator is needed simply multiple the surface area by the shapes depth to arrive at the total volume.

To calculate the area of regular shapes or polygons such as a triangle is simple. However shapes with irregular length sides or the area of a circle requires complex calculations.

Calculating the volume of an object can be achieved using SketchAndCalc™ by calculating the surface area and multiplying it by the objects depth.

Shapes with equal sides can easily by calculated manually. However, a calculator is often needed for complex irregular areas.

The best calculation method depends on the area to be calculated. If you want to calculate the area of a regular shape use the applicable formula. However calculating an area of an odd shape would require an area calculator.

If speed and accuracy are important I recommend using SketchAndCalc™ to calculate the area of any regular or irregular shape.

Of regular, or irregular polygons by drawing the shapes lengths on the canvas using SketchAndCalc™. The square area and perimeter result will be returned when the shape is closed.

Whatever the scale or complexity, simply draw the area on the canvas and SketchAndCalc™ will calculate the perimeter and square area.

Is perhaps the easiest of shapes to calculate using SketchAndCalc™. Simply draw the triangle and collect the square area.

Area = a2

a = length of side

Area = 1 b�h

b = base

h = vertical height

Area = b�h

b = breadth

h = height

Area = b�h

b = breadth

h = height

Trapezium (UK)

Area = 1(a+b)h

h = vertical height

Area = ?r2

Circumference = 2?r

r = radius

Area = ?ab

Area = 1r2?

r = radius

? = angle in radians

A - Area

C - Circumference

L - Length

W - Width

H - Height

r - Radius

d - Diameter

Pi - 3.14 constant (p)

S - Surface Area

Understanding how to calculate area is important to understand at the early age of 8-10. Calculating area is a pre-algebra skill that should be well understood prior to beginning algebra. Students need to understand the early concepts of calculating the area of a variety of shapes. And using our irregular polygon area perimeter calculator is no substitute for this knowledge.

We measure area using squares. We use different sizes of squares depending on how big or small an area is.

Example Lengths of sides of Squares might be:

Size of a draftsmans pencil- Millimeter / Millimetre mm2

Size of piece of paper - Centimeter / Centimetre cm2

Size of a roll of carpet - Meter m2

Size of a parcel of land - Kilometer / Kilometre km2

We write square sizes using a small 2 next to the unit.

We write mm2, cm2, m2 , km2, cm2

We can say "63 millimeters / millimetres squared" or " 63 square millimeters / millimetres"

We could use small squares to measure large areas. The only problem with this is that we would end up having to use very big numbers. For example, a field might be measured at 5,000,000,000 square millimetres / millimetres when 5,000 square meters would be a much easier size to say, write, and visualise / visualize.

You will probably hear more units for measuring area; square inches, square feet, square yards, square miles, acres, hectares are all units used for measuring area.