Question
Sharie makes a canvas frame for a painting using stretcher bars. The rectangular painting will be 12 inches long 9 inches wide. How can she use a ruler to make sure that the corners of the frame will be right angles?
Answers
9 and 12 are two sides of a 3-4-5 triangle (9-12-15) with square corners
the diagonal distance is 15 inches
the diagonal distance is 15 inches
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