math.wiki
Worksheets › Geometry › Chapter 2
Sign in
Geometry · Chapter 2 · Lesson 2.9 · Printable PDF

Auxiliary Lines Worksheet with Answer Key

5 problems on auxiliary lines: deciding which extra lines are justified, and using them to find angles, side lengths and a hexagon angle sum. 2 pages, with a worked answer key.

5 problems2 pagesanswer key
Printable Auxiliary lines worksheet with answer key - Geometry (Page 1 PDF preview)
Page 1 of 2

Download

Worksheet PDFAnswer key

Get this sheet

This sheetWorksheet and answer key, yours to keep.
$5
Buy
SubscriptionOpen any sheet in any course, up to 40 a month, keys included. Or $40 month to month.
$25/mo, billed yearly
Subscribe
Full Course Set510+ Geometry PDF files, no limit, yours to keep.
$400once
Buy

Try one first: a free Chapter 1 worksheet (PDF, no sign-in).

The full Geometry courseEvery lesson in teaching order, with over 510 printables.See the course ›

What's on the worksheet

  1. Decide whether each added segment or line is justified and name the fact behind it.
  2. Use a diagonal to find angles of a quadrilateral.
  3. Find the sloping edge of an A-frame cabin wall from its base and area.
  4. Add a line through X parallel to the given lines to find x.
  5. Prove the angles of a hexagon add to 720 degrees using one diagonal.

Teach it first

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

Auxiliary lines: the lesson ›

More Chapter 2 worksheets: Angle pairs, parallel lines and first proofs