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116_G3U7_WB_CA_˙—» ¿º 2011.4.5 8:21 PM ˘ ` 19 PDF_In 2540DPI 150LPI T
116-P3-1
The Number of Equilateral Triangles
The following figure is made by using matches. Find the number
of equilateral triangles that can be found in the figure below.
Step 1. How many equilateral triangles are there that have a side length of
1 match?
Step 2. How many equilateral triangles are there that have a side length of
2 matches?
Step 3. How many equilateral triangles are there that have a side length of
3 matches?
Step 4. Find the sum of the numbers found in the steps above.
116-P3-1
The Number of Equilateral Triangles
The following figure is made by using matches. Find the number
of equilateral triangles that can be found in the figure below.
Step 1. How many equilateral triangles are there that have a side length of
1 match?
Step 2. How many equilateral triangles are there that have a side length of
2 matches?
Step 3. How many equilateral triangles are there that have a side length of
3 matches?
Step 4. Find the sum of the numbers found in the steps above.
