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The formulae will contain variables representing measure of the figure: the lengths of sides, vertical distance between sides or a point and a side, angles and so on. Find their values for the figure - by measurement, if necessary - and substitute ino the formula. Evaluate [work out the value of] the formula.

Q: How can you use formulas to find the volume or surface area of a geometric figure?

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A pentagon is a two-dimensional geometric figure and therefore has area but not volume. To have volume, a geometric figure must have height or thickness as well as its plane dimensions.

It is its volume which is measured in cubic units

That depends on the figure whose surface area and volume you're finding. You could try a Google search for "volume of [figure name]" or "surface area of [figure name]".

A sphere

No solid figure has a surface area equal to its volume. That would not be possible as the units of measure are different.

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A pentagon is a two-dimensional geometric figure and therefore has area but not volume. To have volume, a geometric figure must have height or thickness as well as its plane dimensions.

a sphere

It is its volume which is measured in cubic units

Volume if it's a 3D figure and area if it's a 2D figure

A sphere has the lowest surface area to volume ratio of all geometric shapes. This is because the sphere is able to enclose the largest volume with the smallest surface area due to its symmetrical shape.

That depends on the figure whose surface area and volume you're finding. You could try a Google search for "volume of [figure name]" or "surface area of [figure name]".

A sphere

A sphere

Formula is a geometry term. Formulas are used to measure area and volume.

If the cell has a simple geometric shape, there are formulae that can be used. Otherwise you need to measure the surface area and the volume.

Difficulty in calculating volume: Irregular solids have complex shapes that do not have simple geometric formulas to calculate their volume. Inaccurate measurements: Due to their irregular shape, measuring the dimensions of irregular solids can be challenging and may lead to inaccurate calculations. Limited surface area formulas: Unlike regular solids, irregular solids do not have standard surface area formulas, making it harder to calculate their surface area.

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