mensuration
Post on 20-Nov-2015
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MATHS PROJECT WORK
EXAMPLE OF PLANE AND 3D FIGURES
PLANE FIGURES3D FIGURESSQUARECUBERECTANGLECUBOIDTRAPEZIUMCYLINDERHEXAGONCONE OCTAGONSPEHERE PENTAGONHEMISPHERECIRCLEPRISM
WHAT ARE 2D OR PLANE FIGURES ?Plane figures are flat two- dimensional (2D)shape. A plane figure can be made of straightlines, curved lines, or both straight and curvedlines.
WHAT ARE 3D FIGURES ?A3D figureis a figure that has height, depth, and width. Such a figure does not lie entirely in a plane.
AREA OF 2D FIGURES
AREA OF SQUAREThe Area is theside length squared: Area = a2
Area of a Square =
Parallelogram
The Area is thebase times the height:Area = b h(his at right angles tob)
Area of aParallelogram =
TrianglesThe area ishalf of the base times height."b" is the distance along the base"h" is the height (measured at right angles to the base)Area = b h
Rectangle
Area of a Rectangle=The Area is thewidthtimes theheight:Area = w h
(Pi) times the Radius squared, which is written: A = r2
The area of a circle is
3D FIGURES
11
VOLUME AND SURFACE AREA OF CUBE
VOLUME AND SURFACE OF CUBOIDVOLUME OF CUBOID = L*B*HT.S.A OF CUBOID =2r(r+h)C.S.A OF A CUBOID =2rh
VOLUME AND SURFACE OF cylinder
VOLUME AND SURFACE OF RIGHT CIRCULAR CONE
VOLUME SURFACE OF SPEHERE
VOLUME AND SURFACE OF HEMISPEHERE
GROUP MEMBERS NAME
ANSHULI 9308 SMITA 9343
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