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Circumference Of The Earth
Lesson 1 Udacity
17
Physics
9th Grade
08/09/2013

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Term
Plato's Guess C.O.E.
Definition
400,000 stadia
74,000 KM
Term
Plato's Error
Definition
85% larger
Term
Archimedes' Guess C.O.E.
Definition
300,000 stadia
55500 KM
Term
Archimedes'Error
Definition
39% larger
Term
1 Stadium/Stadion
Definition
185 M
Term
α Alpha
Definition
Angle #1 in Physics
Term
Congruent
Definition
Same sides and angles
Term
Similar
Definition
Same shape, ratios are common
Term
Hypotenuse
Definition
Longest side on a right triangle
Term
Tangent
Definition

opp.


adj.

Term
Sign
Definition

opp.


hyp.

Term
Cosign
Definition

adj.


hyp.

Term
SOH CAH TOA
Definition
Sin.Opp.Hyp. Cos.Adj.Hyp. Tan.Opp.Adj.
Term
Trigonometry Tables
Definition
Tabulated values for some or all of the six trigonometric functions for various angular values.
Term
Eratosthene's Guess C.O.E.
Definition
250,000 Stadia
46,250 KM
Term
Eratosthene's Error
Definition
16% Larger
Term
arc-tan/cos/sin
Definition
inverse of tan/cos/sin
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