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Geometry · Chapter 6 · Lesson 6.10 · Printable PDF

Proving Properties of an Isosceles Trapezoid Worksheet with Answer Key

6 problems on properties of an isosceles trapezoid: base angles, diagonals, perimeters of triangles, deciding whether legs must be equal, and proofs. 2 pages, with a worked answer key.

6 problems2 pagesanswer key
Printable Proving properties of an isosceles trapezoid worksheet with answer key - Geometry (Page 1 PDF preview)
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What's on the worksheet

  1. Find angles of an isosceles trapezoid from two given angles.
  2. Find the lengths of the diagonal pieces from perimeters of triangles.
  3. Decide which sets of facts force AD = BC and find coordinates when they do not.
  4. Check Liam's proof that base angles are congruent.
  5. Prove a fact about the triangle formed by extending the legs.
  6. Prove a fact about the point where two angle bisectors meet.

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

Proving properties of an isosceles trapezoid: the lesson ›

More Chapter 6 worksheets: Quadrilaterals and polygons