Choose a Category
1. Number
2. Algebra
3. Geometry (Shape + Space)
4. Handling Data
5. Measures
6. Advanced Level
7. Enrichment
8. Func Maths (Themed)
9. Func Maths: GCSE-Type Q's
10. Interesting Investigations
11. Puzzles Corner
12. Mental Maths 5000
13. Festive Maths Mania
14. GCSE Maths Booster: E - B
15. GCSE Maths Booster: F - C
16. GCSE Maths Booster: G - D
17. Maths Booster: L5 - 8 (800)
18. Maths Booster: L4 - 7 (800)
19. Maths Booster: L3 - 6 (800)
20. Key Stage 1
Click My Account to download your FREE PRESENTATIONS
LEA Logo
Product Information

Angles 9a (Eratosthenes: Earth Measure)

Shape and Space Powerpoint Presentation

Angles 9a (Eratosthenes: Earth Measure)

The use of "alternate angles" was a key feature in the measurement of the circumference of the Earth by Eratosthenes and that is why it has been included here. A fascinating story that demonstrates why the Ancient Greeks thought the Earth was spherical. Briefly discusses the fall of Athens and the rise of Alexandria. A clear explanation of latitude and longitude has been built in, in order to help the students get to grips with the problem more easily. Takes the students through the problem step-by-step and builds in the opportunity for them to work it out by themselves once they have enough information. Needs to be done with selected groups. A good one for when you're asked "what's the point of this"

Slides Animation Sound Worksheets Rating
15 y y y rating


Shopping Basket

Select A Display Currency
If your currency is not displayed, please choose either USD or GBP. Additional currencies will be available soon.
GBP (£)
USD ($)
EUR (€)
CAD ($)
AUD ($)
Currently set to: