MODULE 6: Shapes Flashcards
(46 cards)
Etymology of Geometry (Greek).
Geo (earth) and Metron (measurement) –> study of Earth’s measurement
What does Geometry study?
sizes, shapes, angles, positions, and dimensions of things
Three Mathematics before Euclidean Mathematics
Babylonian
Egyptian
Greek
Babylonian Mathematics were written in ______ on _______.
Cuneiform
Clay Tablets
The Mathematics that gave us formulas on the areas and volumes of circles and cylinders.
Babylonian
The circumference of a circle according to Babylonian Mathematics.
three times the diameter (3D)
The approximation of pi in Babylonian Mathematics.
3
The area of a circle according to Babylonian Mathematics.
1/12 of C^2 (square of the circumference)
First to use the Pythagorean Theorem/Triples.
Babylonians
Gave us formulas in finding areas and volumes that they used in constructing pyramids and determining food supply.
Egyptian
The Mathematics that discovered irrational numbers.
Greek
First mathematician to calculate the circumference of the Earth.
Eratosthenes (40,000 km)
Discovered the Pythagorean Theorem.
Pythagoras
Contributed to finding the volumes of irregular shapes.
Archimedes of Syracuse
Accurately approximated the value of pi using the method of exhaustion developed by Eudoxus of Cnidus.
Archimedes of Syracuse
Golden Rectangles
rectangle with the most pleasing proportions
responsible for Euclidean Geometry, the mathematical system used globally
Euclid of Alexandria
Euclid’s Textbook
The Elements
Undefined terms according to Euclid
points
lines
planes
Axioms are
logical mathematical statements that do not need to be proven
Euclid’s Five Axioms
- Things that are equal to the same things are equal
- If equals are added to equals, then the wholes are equal
- If equals are subtracted from equal, then the remainders are equal
- Things that coincide with one another are equal to another
- The whole is greater than the part
Postulates are
Mathematical statements are considered true as long as it is not disproven.
Euclidean Postulates
- A straight line can be drawn from any point to any point
- A finite straight line can be produced continuously in a straight line
- A circle may be drawn with any point as the center and any distance as a radius
- All right angles are equal to one another
- Parallel Postulate
Playfair’s Axiom states
Only one line that passes through point P can be parallel to line I