Printable worksheets
Thales theorem
Use parallel lines to find lengths.
Loxivia · Oct 16, 2026 · 8 questions
Warm-up
- Thales — practice 1 — Answer the quick questions.
- Thales — practice 2 — Answer the quick questions.
- Thales — practice 3 — Answer the quick questions.
- Thales — practice 4 — Answer the quick questions.
Practice
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1. What is 9 × 20? (Thales theorem)
= ______________________
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2. What is 21 ÷ 7? (Thales theorem)
a) 4 b) 2 c) 7 d) 3 -
3. What is the mean of: 15, 2, 11, 4? (Thales theorem)
a) 15 b) 9 c) 7 d) 8 -
4. What is 10 × 19? (Thales theorem)
= ______________________
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5. What is 9 × 7? (Thales theorem)
a) 72 b) 64 c) 54 d) 63 -
6. 8 rows of 5 items — how many in total? (Thales theorem)
a) 32 b) 48 c) 13 d) 40 -
7. What is 16 × 11? (Thales theorem)
= ______________________
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8. What is 11 × 5? (Thales theorem)
= ______________________