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边数决定名称 = bilangan sisi menentukan nama 用周长除以每一条边的长度，就知道一共有几条边。例如“二十八里面有几个七”可以用七的乘法表来想。得到边数以后，再想有这么多条一样长的边的正多边形叫什么。 例子：周长 45 cm、每边 9 cm：45 ÷ 9 = 5，是正五边形。 注意：除法算完要用乘法检查。

the number of sides gives the name = bilangan sisi menentukan nama Divide the perimeter by the length of each side to find how many sides there are; the seven times table helps. With that number, think what the regular polygon with that many equal sides is called. Example: perimeter 45 cm with 9 cm sides: 45 ÷ 9 = 5, a regular pentagon. Watch out: after dividing, check by multiplying.

等边三角形的边长 = sisi segi tiga sama sisi 等边三角形三条边一样长，周长平均分成三份就是一条边。所以用周长除以三。算好以后，三乘你的答案要等于周长。 例子：周长 21 m 的等边三角形，每边 21 ÷ 3 = 7 m。 注意：答案要带长度单位。

side of an equilateral triangle = sisi segi tiga sama sisi The three sides of an equilateral triangle are equal, so one side is the perimeter shared into three equal parts: divide the perimeter by three. Afterwards, three times your answer should equal the perimeter. Example: an equilateral triangle with perimeter 21 m has sides of 21 ÷ 3 = 7 m. Watch out: give the answer with a length unit.

求边数 = cari bilangan sisi 周长是所有边加起来的长度。每条边一样长，所以“周长里有几个边长”就是边数，用除法计算。边数多也没关系，正多边形可以有很多条边。 例子：周长 60 cm、每边 5 cm，60 ÷ 5 = 12，有十二条边。 注意：算完用乘法检查。

finding the number of sides = cari bilangan sisi The perimeter is the length of all the sides together. Every side is equal, so how many side lengths fit in the perimeter is the number of sides; use division. It does not matter if the number is large; a regular polygon can have many sides. Example: perimeter 60 cm with 5 cm sides: 60 ÷ 5 = 12, so there are twelve sides. Watch out: check by multiplying when you finish.

找出不能围成的 = cari yang tidak boleh 这一题问的是“不能”。逐个用铁线长度除以边数：除得尽的，边长是整数，可以围成；除不尽、有余数的，边长不是整数，就不能围成。 例子：一条 14 cm 的铁线，14 ÷ 4 有余数，所以不能围成整数边长的正方形。 注意：看清题目问的是可以还是不可以。

finding the one that cannot be made = cari yang tidak boleh This question asks which cannot be made. Divide the wire length by the number of sides for each: if it divides exactly, the side is a whole number and it can be made; if there is a remainder, the side is not whole and it cannot. Example: with a 14 cm wire, 14 ÷ 4 leaves a remainder, so a square with whole-number sides cannot be made. Watch out: read carefully whether the question asks which can or which cannot.