Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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**stellina91****Member**- Registered: 2008-04-15
- Posts: 12

**Show that A, O and D are collinear.**

Can someone please help me, I forget how to do these!

Thanks.

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**JaneFairfax****Member**- Registered: 2007-02-23
- Posts: 6,868

Ask your two questions.

(i) What is the meaning or definition of the term collinear?

(ii) What do those three angles add up to?

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**Monox D. I-Fly****Member**- Registered: 2015-12-02
- Posts: 926

Although the angle showed that they were collinear, the image didn't.

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