# Each side of a square measures 65 m 5 dm.Find its area. By how many square metres does it fall short of a hectare?

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To find the **Area **of a quadrilateral, you always multiply **Length * Width**. In the case of a square, all sides are the same length, so you simply multiply 65.5* 65.5. The reason you can use 65.5 is that there are **10 decimeters in one meter,** so if you convert decimeters to meters you have 5/10 of a meter.

This is a **two-step** problem. After you have found the Area of the square, you must then subtract it from 10,000 which is how many square meters are in a **hectare**.

Your problem will look like this:

65.5*65.5 = **A **of square

10,000 - **A** = X sq meters

65 m 5 dm

convert the dm into meters. There are 10m in 1dm so just divide the 5 by 10

5dm / 10 = .5 m add it to 65m

65 + .5 = 65.5 m

to find the area of the square, multiply 65.5 by itself:

65.5 x 65.5 = y meters squared

**10,000 - y = h**

**65m 5dm** is the same as **65.5m.**

To find the area of a square you multiply two of its sides...

So the area of your square is...

65.5 x 65.5 = **X m.sq.**

A **hectare** is a unit of area equal to **10,000 m.sq**

So your answer will be **10,000 - X** and the units will be Square Meters