Question

Look at the right triangle ABC.



A student made the following chart to prove that AB2 + BC2 = AC2.

What is the flaw in the student’s proof?

Justification 4 should be “AB ÷ AD = AB ÷ AC because triangle ABC is similar to triangle ABD”.

Justification 1 should be “Angle ABC = Angle BDC and Angle BCA = Angle BCD”.

Justification 2 should be “BC ÷ DC = BC ÷ AC because triangle ABC is similar to triangle BDC”.

Justification 3 should be “Angle ABC = Angle BAD and Angle BAC = Angle ABD”.

Answer 1

http://learn.flvs.net/webdav/assessment_images/educator_geometry_v14/pool_Geom_3641_1000_Subtest_02_07/image0014e8c6013.jpg

Answer 2

I think its C. >.<