Photo 1 of Mr. Pen- Triangle Ruler, 2 Pack, 17&11, 30/60 & 45/90, Right Triangle Ruler for Drawing, 30/60 Degree Triangle Plastic, 30 60 90 Triangle, Drawing Triangle Angle

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Photo 1 of Mr. Pen- Triangle Ruler, 2 Pack, 17&11, 30/60 & 45/90, Right Triangle Ruler for Drawing, 30/60 Degree Triangle Plastic, 30 60 90 Triangle, Drawing Triangle AnglePhoto 2 of Mr. Pen- Triangle Ruler, 2 Pack, 17&11, 30/60 & 45/90, Right Triangle Ruler for Drawing, 30/60 Degree Triangle Plastic, 30 60 90 Triangle, Drawing Triangle Angle