91Ó°ÊÓ

If the length and width of a rectangular solid are each decreased by 20%, by what percent must the height be increased for the volume to remain unchanged? Give your answer to the nearest whole percent.

The length of an altitude is called the ___ of the following prism.

Copy and complete the table below for the regular square pyramid.

$\begin{array}{cc}\text{Height},\text{ }h& \\ \text{³§±ô²¹²Ô³Ù â¶Ä‰H±ð¾±²µ³ó³Ù},\text{ }l& 5\\ \text{µþ²¹²õ±ð â¶Ä‰e»å²µ±ð}& 8\\ \text{³¢²¹³Ù±ð°ù²¹±ô â¶Ä‰e»å²µ±ð}& \end{array}$

V- ABCD is a regular square pyramid. Find the following numerical answers.

$\text{L.A.}=\_\_\_$

Refer to rectangular solids with dimensions l, w and h. Complete the following table.

$\begin{array}{cc}l& 5x\\ w& 4x\\ h& 3x\\ \text{L.A.}& \\ \text{T.A.}& \\ V& \end{array}$

Refer to rectangular solids with dimensions l, w and h. Complete the following table.

$\begin{array}{cc}l& 9\\ w& \\ h& 2\\ \text{L.A.}& 60\\ \text{T.A.}& \\ V& \end{array}$

Copy and complete the table below for the regular square pyramid.

$\begin{array}{cc}\text{Height},\text{ }h& 6\\ \text{³§±ô²¹²Ô³Ù â¶Ä‰H±ð¾±²µ³ó³Ù},\text{ }l& \\ \text{µþ²¹²õ±ð â¶Ä‰e»å²µ±ð}& \\ \text{³¢²¹³Ù±ð°ù²¹±ô â¶Ä‰e»å²µ±ð}& 10\end{array}$

Consider the following prism.

Suppose the bases are regular hexagons with 4cm edges.

a.Find the lateral area.

b.Find the base area.

c.Find the total area.

d.Find the volume.

V- ABCD is a regular square pyramid. Find the following numerical answers.

$\text{Volume}=\_\_\_$

Sketch the following pyramid. Then find its lateral area.

A regular triangular pyramid with base edge 4 and slant height 6.