Embedded Files
Areas
Using the cube below as an example:
To find the area of one face of the cube, since it is rectangle, use the formula
area = length x breadth
The area of the right facing side of the cube (the darker shaded face) is
area = 2 cm x 3 cm
area = 6 cm2
ON YOUR OWN: Review the formulas to find the area of regular shapes: triangle, circle, trapezium, parallelogram.
Measuring VolumeThere are two ways that you can go about measuring volume of an object. If the shape is regular, as in a cube or a sphere, measure the dimensions and use a formula to calculate the volume of the object. The volume of the cube to the rightVolume = length x breadth x height volume = 5 cm x 2 cm x 3 cm = 30 cm3ON YOUR OWN: Review the formulas to find the volume of regular objects: sphere, cube, pyramid, cuboid.
Otherwise, and if the object is irregular use the method below.
Finding the volume of a solid that can be immersed in water
Rest Eureka can on a flat surface. (A Eureka can has a sprout half way a long the body of the can so that it can only hold liquid to that point. See pic below)
Fill can to the sprout and allow excess to run off in a waste container
Place a dry clean container below the spout and slowly lower the solid into the water
Catch the overflow and measure the volume by pouring into a measuring cylinder.
Repeat to reduce errors.
Page updated
Google Sites
Report abuse