Course:MATH230/Archive/2010-2011/101/groups/group04
Group 4
G-I'm-A-Tree (Geometry)
Shapes
| Circles | Ellipses | Squares | Triangles | Polygons | |
|---|---|---|---|---|---|
| Area | πr² | πab | bh | ½bh | -- |
Other shapes: hexagaons, octagons
Objects: cylinders, cubes, spheres
Circle: every point on the line is equidistant from the centre; each point on the line has a corresponding point on the other side of centre; the shape is symmetrical.
Diameter: distance across a circle
Radius: distance from the centre of the circle to its perimeter
π
π = 3.1415926
Definition: The ratio between any circle's circumference to its diameter. Pi is irrational and neverending.
Circumference of a circle = 2πr
Line Segments
Definition: the line between two points
Angles
Right angles: 90°
Complementary angles: angles that add up to 90°
Supplementary: angles that add up to 180°
Corresponding angles: angles in matching corners formed by two lines crossing another line. When the two lines are parallel, the angles are equal.
The sum of angles in a triangle equals 180°.
SOH CAH TOA
- Sine, Cosine, Tangent
Pythagoras' Theorem
Euclidean space
Coordinates, x-values, y-values
Related Thinkers
Pythagoras, Archimedes
Scratch Screenshots
