MLK and His Numbers

In honor of Dr. Martin Luther King's birthday today (January 15), it gave me a chance to think of some facts related to him...

1.  This would've been Dr. King's 82nd birthday.  If you switch the numbers around in 82, you would get 28 --- the number of years ago that President Ronald Reagan signed the bill to give the doctor a holiday in his name.

2.  28 is also the date in August 1963 that Dr. King gave his "I Have a Dream" speech.

3.  28 is also divisible by 4, which happens to be the number of children that he and his wife, Coretta Scott King, had.

4.  Since his birthday has been honored as a national federal holiday, January 15th has been the 3rd Monday of the month four times (1990, 1996, 2001, 2007).  There's that four again...

5.  Unfortunately, 4 is also the date that Dr. King passed away in April 1968 in Memphis, TN.

Speaking for everyone (if I may), thank you, Dr. King, for all of the efforts you gave to the American people of all races!

This post is for you, sir!

Geometry Online Question #1 (Update)

***********UPDATED*******************
Thank you for visiting the blog. You have until Friday, January 14, 2011 by 7:00 PM to answer the
following TWO-PART question. Make sure that you use COMPLETE sentences. For example, "No", "Yes", or "I don't know" would not be acceptable for full credit.

You have three options to submit your answers:

1.  E-Mail me at whatsmynumber@gmail.com.  Include your first and last name, class period, and your answers.

2.  Send me a message through my Facebook page at www.facebook.com/mathauthority.  Include your first and last name, class period, and your answers.


 
3.  Post on this blog by doing the following...

• Click on the link above and then post your comment.
• Be sure to include your first and last name, class period, and your answer to the questions in the comment box. 
• Once you finish, click the drop down arrow below the comment box and choose "Anonymous".
• If you have any problems commenting, please e-mail me at whatsmynumber@gmail.com.

Here is the two-part question... This counts as ONE homework grade and ONE quiz grade!


a. Write the contrapositive of the following statement and then determine if its true or false:  "If there are only 28 days in a month, then the month must be February."

b.  From our textbook, complete the proof below by filling in any statements or reasons that are blank.

I also have an extra credit opportunity.  Click on this link for details.

Good luck!

Gotta Love the Calendar!

While working on his semester exam review today in class, a student of mine named Kameron shouted "I could put a plus sign here!"  He came to show me why he did that and I noticed something that I can't believe I didn't even think about until then.  If you write today's date (January 10, 2011) in the MM-DD-YY form, you get 1-10-11.  He put the plus sign between the 1 and 10 and... wala!  Instant math problem!

So then I asked him what's the next date that will happen?  After thinking about it, he said February 9, 2011, which is correct.  In fact, this happens at some point in every month this year except one.

Can you figure it out the other dates?

Also, tomorrow's date has an interesting property.  There is another date this year has that same property.  Can you figure THAT property out?

Post your comments or shoot me an e-mail at whatsmynumber@gmail.com.