Triangle with stripes.

Geometry Level 2

What is the percentage of the blue region if all stripes have the same height?

20 % 20\% 50 % 50\% 40 % 40\% 10 % 10\% 30 % 30\%

Hana Wehbi by Hana Wehbi , 51, USA

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1 solution

Hana Wehbi
Feb 10, 2018

There are 25 triangles, where 15 are not blue and 10 are blue, thus the percentage of the blue is 10 25 = 1 4 = 0.40 or 40 % \frac{10}{25}=\frac{1}{4}=0.40 \text{ or }40\%

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