Conditions for similar triangles

Apply the AAA, SSS, SAS and RHS tests to show two triangles are similar, then use them to solve problems such as finding heights from shadows.

⏱ 19 min❓ 10 questions

What you'll be able to do

✔I can state the AAA, SSS, SAS and RHS conditions for similar triangles
✔I can choose the right condition to prove two triangles are similar
✔I can use similar triangles to find heights and distances that are hard to measure directly

How this works

1Read the short explanations first — they teach you what you need before each question.
2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.

What's inside

10 questions and 1 quick teaching card, including:

🔘Multiple choice — Tap the answer you think is best, then check it.
⚖️True or false — Read the statement and decide if it's true or false.

👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.

Curriculum: AC9M9SP01