smc-666-40-Surface Area

Measurement, NAP-A3-CA30 SA

Clancy needs to paint all sides of a triangular prism.

The area of each triangular face is 12 cm².

What is the total area Clancy needs to paint?

cm²

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`78\ text(cm²)`

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`text(Total Area)`	`= (2 xx 12) + 2 xx (3 xx 5) + (8 xx 3)`
	`= 78\ text(cm²)`

A block is in the shape of a prism.

Its surface is covered in triangles and squares.

How many triangles and how many squares cover the entire surface of the block?

	triangles
	squares

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`text(Triangles = 12)`

`text(Squares = 18)`

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`text(Triangles)`	`=\ text(6 at either end)`
	`= 12`

One face of a cube has a surface area of 25 600 cm².

What is the length (cm) of one edge of the cube?

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`160`

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`text(Length of one edge of the cube)`

`=sqrt (25\ 600)`

`= 160\ text(cm)`