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Geometry · Chapter 4 · Lesson 4.5 · Printable PDF

Proving Parts Congruent After the Triangles Worksheet with Answer Key

6 problems on proofs with CPCTC: proving triangles congruent first, then parts congruent, with wheel, quadrilateral and pentagon figures. 3 pages, with a worked answer key.

6 problems3 pagesanswer key
Printable Proving parts congruent after the triangles worksheet with answer key - Geometry (Page 1 PDF preview)
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Try one first: a free Chapter 1 worksheet (PDF, no sign-in).

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What's on the worksheet

  1. Compare three students' plans for reaching two congruent parts.
  2. Find x and y from congruent triangles in a quadrilateral with a diagonal.
  3. Use a wheel with 12 equal spokes and equal bars to find angles.
  4. Correct a proof line that cites the ASA postulate and a midpoint.
  5. Prove a segment fact for a quadrilateral with a pair of equal parallel sides and points on a diagonal.
  6. Prove a fact about a pentagon with equal sides and a midpoint F.

Teach it first

The free lesson teaches it with worked examples and practice problems.

Proving parts congruent after the triangles: the lesson ›

More Chapter 4 worksheets: Triangle congruence and proof