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
-
1. What is 19 × 17? (Thales theorem)
= ______________________
-
2. A triangle has four angles. (Thales theorem)
a) True b) False -
3. A triangle has angles 87° and 22°. What is the third angle? (Thales theorem)
a) 93 b) 81 c) 3 d) 71 -
4. In which quadrant is the point (-3, 3)? (Thales theorem)
a) I b) III c) IV d) II -
5. What is the slope of y = x² at x = 6? (Thales theorem)
a) 36 b) 12 c) 14 d) 6 -
6. What is the derivative of 4 x² + 4 x? (Thales theorem)
a) 8x + 8 b) 4x + 4 c) 8x + 4 d) 8x -
7. Share 6 in the ratio 1 : 1. How much is the larger part? (Thales theorem)
a) 6 b) 3 -
8. Every prime number is odd. (Thales theorem)
a) True b) False