This Week's Work : Week 15 - for Inquisitive Young Mathletes

Part I work for this week:

See if you can write proof to show the exterior angle of any regular convex polygon is \(\frac{360}{n}\).
I'll include that in my blog for better proof.

Polygons Part I : interior angle, exterior angle, sum of all the interior angles in a polygon, how many diagonals
in a polygon

Polygons Part II : reviews and applicable word problems

Interior angles of polygons from "Math Is Fun"

Exterior angles of polygons from "Math Is Fun"

Supplementary angles

Complementary angles

Get an account from Alcumus and choose focus topics on "Polygon Angles" to practice.
Instant feedback is provided. This is by far the best place to learn problem solving, so make the best use of
these wonderful features.

This week's video on math or science : Moebius Transformations Revealed

Part II work online timed test word problems and link to key in the answers will be sent out through e-mail.

Have fun problem solving !!

This Week's Work : Week 14 - for Inquisitive Young Mathletes

Venn Diagram explained from AoPS : learn the two set and three set examples

Principle of Inclusion-Exclusion from AoPS: again, two set and three set examples

Video on Venn Diagrams with Two categories from AoPS

Video on Venn Diagrams with Three categories from AoPS

Word problems on Venn diagrams medium level (instant feedback)

Word problems on Venn diagrams medium hard level (instant feedback)

The common error for most students (especially boys, oh oh) is arithmetic error.

Make sure you line the category with specific number given right and check your math.

Chicken, rabbit algebra speed test : aim for less than 5 minutes. No calculator, please !!

Motivation, Not IQ, Matters Most For Learning New Math Skills from Time Magazine

Power of Ten Video