Worksheet 12 – Geometry of Straight Lines for Grade 9

This worksheet on geometry of straight lines for grade 9 covers the basics of geometry, including

• vertically opposite angles
• supplementary
• and complementary angles
• parallel lines which include
  • alternating angles,
  • corresponding angles and
  • co-interior angles
• and perpendicular lines.

The worksheet comes with a fully worked out memo. Although it should be noted that only one solution to each geometry problem was given, but there are many different ways to arrive at the same solution. So, as long as the logic is mathematically sound and the answers are the same, the marks should be awarded.

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Worksheet 12 – Geometry of Straight Lines for Grade 9

Worksheet 12 Memo – Geometry of straight lines.