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117_G3U8_WB_CA_˙—» ¿º 2011.4.5 8:20 PM ˘ ` 19 PDF_In 2540DPI 150LPI T
117-P3-1
Connecting Equilateral Triangles
The following figure is made by connecting equilateral triangles. If
the side length of the smallest equilateral triangle is 5 cm, what is
the side length of the largest equilateral triangle?
Step 1. The side length of triangle B is 2 times the side length of triangle A.
What is the side length of triangle B?
B C
A
Step 2. From the picture shown above, the side length of triangle C is the
sum of one side length of triangle A and one side length of triangle
B. What is the side length of triangle C?
117-P3-1
Connecting Equilateral Triangles
The following figure is made by connecting equilateral triangles. If
the side length of the smallest equilateral triangle is 5 cm, what is
the side length of the largest equilateral triangle?
Step 1. The side length of triangle B is 2 times the side length of triangle A.
What is the side length of triangle B?
B C
A
Step 2. From the picture shown above, the side length of triangle C is the
sum of one side length of triangle A and one side length of triangle
B. What is the side length of triangle C?
