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123_G4U6_WB˜ ˙—» ¿º 2011.3.30 5:31 PM ˘ ` 23 PDF_In 2540DPI 300LPI T
123-S1-1

1. Find the number of acute triangles and obtuse triangles in the shape
below.

Number of acute triangles:
Number of obtuse triangles:
   144   145   146   147   148   149   150   151   152   153   154