Thursday, October 15, 2015

Math problem of the week: traditional vs. Common Core-inspired geometry proofs

I. One of only two problems involving an actual proof in the 18 sample problems in PARCC's practice geometry test:



II. One proof among many hundreds throughout Weeks & Adkins A Course in Geometry (published in 1970):



III. Extra Credit: From similar triangles to dissimilar problems

Compare the ratios of time and effort spent making sense of the two initial statements in each problem to constructing the solicited proof.

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