How many lessons are in Measuring the Unreachable?

10 lessons: 3.1 Pythagoras' theorem (finding the hypotenuse), 3.2 Finding a shorter side with Pythagoras, 3.3 Pythagoras in 2D problems, 3.4 Introducing the trig ratios (SOH CAH TOA), 3.5 Finding an unknown side with trig, 3.6 Solving for the unknown in the denominator, 3.7 Finding an unknown angle with inverse trig, 3.8 Applications of trigonometry (elevation/depression), 3.9 Bearings, Putting it together.

Is the Measuring the Unreachable study guide free?

This page is free to read, with nothing to buy and no account to make. It sets out what the unit covers. The full guide isn't published online; it's what our tutors teach from in lessons.

Can BTA tutor Year 9 Mathematics Standard?

Yes. We tutor Year 9 Mathematics Standard one-on-one at any of our eight academies across five locations, online through Microsoft Teams, or in your home. All three cost the same hourly rate and the first consultation is free.

Year 9 Mathematics Standard · Chapter 3

Measuring the Unreachable

Year 9 Mathematics, Standard - NSW Stage 5. Measuring the Unreachable, 10 lessons, written to the NSW Mathematics syllabus.

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In this chapter

What the guide holds

Every lesson runs the same way: worked examples paired with a your-turn column, a four-stage practice ladder from fluency to exam-style questions, and full worked solutions for every question at the back of the chapter.

Includes three practice examinations on this chapter, sharing no question between them, each with its own worked solutions. Sit one and keep the other two for revision.

10 lessons

Lesson by lesson

3.1 Pythagoras' theorem (finding the hypotenuse)
3.2 Finding a shorter side with Pythagoras
3.3 Pythagoras in 2D problems
3.4 Introducing the trig ratios (SOH CAH TOA)
3.5 Finding an unknown side with trig
3.6 Solving for the unknown in the denominator
3.7 Finding an unknown angle with inverse trig
3.8 Applications of trigonometry (elevation/depression)
3.9 Bearings
Putting it together

Year 9 Mathematics Standard

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Common questions

Questions about this chapter

What does Measuring the Unreachable cover?: Year 9 Mathematics, Standard - NSW Stage 5. Measuring the Unreachable, 10 lessons, written to the NSW Mathematics syllabus.
How many lessons are in Measuring the Unreachable?: 10 lessons: 3.1 Pythagoras' theorem (finding the hypotenuse), 3.2 Finding a shorter side with Pythagoras, 3.3 Pythagoras in 2D problems, 3.4 Introducing the trig ratios (SOH CAH TOA), 3.5 Finding an unknown side with trig, 3.6 Solving for the unknown in the denominator, 3.7 Finding an unknown angle with inverse trig, 3.8 Applications of trigonometry (elevation/depression), 3.9 Bearings, Putting it together.
Is the Measuring the Unreachable study guide free?: This page is free to read, with nothing to buy and no account to make. It sets out what the unit covers. The full guide isn't published online; it's what our tutors teach from in lessons.
Can BTA tutor Year 9 Mathematics Standard?: Yes. We tutor Year 9 Mathematics Standard one-on-one at any of our eight academies across five locations, online through Microsoft Teams, or in your home. All three cost the same hourly rate and the first consultation is free.

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