Mathematics 24x7

There is no escape...believe it or not. Mathematics is everywhere.

Christian Baune
• Male
• Brussels
• Belgium

41 members

30 members

45 members

# Christian Baune's Page

## Latest Activity

Christian Baune replied to Christian Baune's discussion Triangle in the group Math Problem Solving
"Area of enclosing rectangle : $3*5 = 15$ Small triangles : $\frac{1*3+4*2+1*5}{2}=8$ The triangle: $15-8=7$ The height: $\sqrt{5^2+1}*\frac{h}{2}=7$ $h=2*\frac{7}{\sqrt{5^2+1}}$"
Aug 4, 2016
Christian Baune replied to Christian Baune's discussion Triangle in the group Math Problem Solving
"The simplest answer only involve knowledge of Pythagoras'theorem. (All your's are good but use advanced knowledge)  "
Feb 7, 2011
Walter Cravero replied to Christian Baune's discussion Triangle in the group Math Problem Solving
"h = height wanted length of AC = ||AC|| = sqrt(26) h = (Area of triangle)/(1/2*||AC||) Area of Triangle = 1/2*||cross product of AB and AC|| AB = (1,3)         AC = (5,1) ||cross product of AB and AC|| = 5*3 -…"
Feb 7, 2011

### triangle solution

"Yes ! That's it !"
Dec 9, 2010
Christian Baune updated their profile photo
Dec 9, 2010
Christian Baune replied to Christian Baune's discussion Triangle in the group Math Problem Solving
Dec 9, 2010
Math Chique replied to Christian Baune's discussion Triangle in the group Math Problem Solving
Dec 8, 2010
Christian Baune replied to Christian Baune's discussion Triangle in the group Math Problem Solving
"This is not the "simplest" solution since it involve solving a system with squares. This problem is about to change your point of view and refrain to go for "solving the system" :-)"
Nov 7, 2010
Math Chique replied to Christian Baune's discussion Triangle in the group Math Problem Solving
"Let AD = x, DC = y, and BD = Z. By the Pythagorean Theorem c = 10^.5, b = 26^.5, and a = 20^.5"
Nov 7, 2010
"We can also introduce a function in an abstract way then go toward something more concrete. I tried to do something like that in the attached document."
Nov 4, 2010
Christian Baune added a discussion to the group Introducing Math Concepts

### Document that permit to assess symbolism comprehension

Most of the time, student fail to solve a problem simply because they do not know what to do.Then, when they have a vague idea of what they have to achieve, they do not necessary are able to use/understand mathematic symbols.I've made a document that could permit to know the "level" of a student according to his math symbol comprehension.These are 58 questions that DO NOT REQUIRE advanced PROCESSING. It's direct application and student is NOT required to THINK.All questions are multiple choice…See More
Oct 17, 2010
Christian Baune replied to Colin McAllister's discussion Height of a distant skyscraper? in the group Math Problem Solving
"There is two unknown. What does "can be seen 95 km away" ? We must either know value of θ angle (vision angle) or "perceived height" (h') and perceived distance. It should then be rephrased in one of these ways…"
May 5, 2010
"The empty set is here but can't be seen :-) (intersection of none, part of outside) I think that nested sets are not convenient because it became quickly messy. My representation does not give the feeling that "{A,B}'" is…"
Feb 8, 2010
"Should be self explanatory :-)"
Feb 7, 2010
Christian Baune added a discussion to the group Math Problem Solving

### Interesting problems on my website

Hi every body,check out brand new problems with solution(s) on my website : www.programaths.beFeel free to discuss them and drop me a line.See More
Dec 18, 2009
"When you said that the problem shouldn't be a variation of the "book problem" I would enforce it that way : In the pool of problem, some must introduce new concept to work on. Students should be able to leverage their knowledge to…"
Dec 17, 2009

## Profile Information

Name
Baune Christian
Philosophy of life
Analyse, decompose, understand and enjoy !
Cyber House
http://www.programaths.be
Profession
Analyst-devlopper
Maths
You in one line.
"You"

## Christian Baune's Blog

### How do you perceive maths ?

Posted on July 14, 2009 at 9:30pm

The two following problem permit to know how you work your way in maths.

Explanation came after the two problems

## Triangle

Can you find wich configuration of the 3 points gives the greater area for the triangle A,B,C ?

Can you prove your it ?

## Trapezoid

Given the following picture of a trapezoid:

What's the area of the greyed…
Continue

At 4:09pm on July 10, 2009, Rashmi Kathuria said…
Welcome to Mathematics 24x7. The purpose of this network is to talk about all possibilities in Mathematics .There are people who love this subject and at the same time there are ones who are struggling for it.
Let us join our hands and look for all ingredients to make it interesting for everybody.
Thanks for joining this network.
Keep Sharing
At 10:19pm on December 12, 2009, monika hardy said…
i loved your comment on Will Kimbley's video 'Technology in my classroom - Channel 30 News'.
it was like all of math's pedagogy in one comment. thank you for the insight.

look forward to following more of your thinking. are you on twitter?