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The lesson starts y reviewing how you calculate area of a triangle. The math slideshow lesson takes a triangle, makes a similar triangle, flips it over and puts both triangles next to each other to reveal a parallelogram. THE ANIMATION ON THIS IS FABULOUS! My students really love this! To find area of a parallelogram you multiply base times height. However the animation shows that you only want to find half of the area (or just 1 triangle not 2.) So the lesson shades in one of the triangles and shows that is why you multiply base times height and then divide by 2.
The lesson continues to show students how to discover the formula for area of a trapezoid. It takes a trapezoid, makes a similar trapezoid, flips it over, and puts both trapezoids next to each other (very similar to the triangle demonstration.) THE ANIMATION ON THIS IS AMAZING! When you do this you have 2 trapezoids put together that make a parallelogram. The slideshow walks you through why you add base 1 plus base 2, then multiply by the height, and lastly divide by 2.
The lesson continues with several examples for students to try. The lesson ends with study guide notes for students to take at the end, which review all concepts taught in the lesson.
To see more information on the all of the math slideshows visit
http://www.mathslideshows.com/
The lesson continues to show students how to discover the formula for area of a trapezoid. It takes a trapezoid, makes a similar trapezoid, flips it over, and puts both trapezoids next to each other (very similar to the triangle demonstration.) THE ANIMATION ON THIS IS AMAZING! When you do this you have 2 trapezoids put together that make a parallelogram. The slideshow walks you through why you add base 1 plus base 2, then multiply by the height, and lastly divide by 2.
The lesson continues with several examples for students to try. The lesson ends with study guide notes for students to take at the end, which review all concepts taught in the lesson.
To see more information on the all of the math slideshows visit
http://www.mathslideshows.com/
K-12 Subject:
Teaching Duration:
50 Minutes
Type of Resource:
Answer Key:
N/A
# of Pages/Slides:
20
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FILE DETAILS
Presentation (Powerpoint) File
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650 KB | 20 Pages
FEEDBACK
Mrseverlof
Excellent resource The flipping of the shapes really helped the students understand the formula.
April 14, 2013 
Daily Dose Of Math Lady (TpT Seller)
This was great! The flipping of the figures and moving them side by side was a great visual for my students to help them truly understand the reasoning behind the formulas! Thanks for a great product!!
April 10, 2013
beckyhendrickson
Fabulous!
March 28, 2013
Scipi (TpT Seller)
I love this because you are using former knowledge to discover the forumla. I do that, too!
November 1, 2011
Showing 1-4 of 4
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Scipi (TpT Seller)
I saw your store on the home page of Teachers Pay Teachers; so, I thought I would look at your freebie. I left you a rating. Well done!
I hope you will have time to rate one of my freebies listed below.
http://www.teacherspayteachers.com/Product/ChristmasHoldiay-Fraction-Words-Identifying-Fractional-Parts
I am now your 2nd follower, and hope you will reciprocate at my store as well. http://www.teacherspayteachers.com/Store/SciPi/Products
I also have a math blog, if you are interested: http://gofigurewithscipi.blogspot.com/
The teaching world needs quality math materials; so, good luck as you sell on TPT!
I hope you will have time to rate one of my freebies listed below.
http://www.teacherspayteachers.com/Product/ChristmasHoldiay-Fraction-Words-Identifying-Fractional-Parts
I am now your 2nd follower, and hope you will reciprocate at my store as well. http://www.teacherspayteachers.com/Store/SciPi/Products
I also have a math blog, if you are interested: http://gofigurewithscipi.blogspot.com/
The teaching world needs quality math materials; so, good luck as you sell on TPT!
November 1, 2011
Amber Pasillas (TpT Seller)
Hello Scipi!
Thank you for following me. I am new to TpT. I am now following you too!
I have over 300 Powerpoint slideshows available on my website:
http://www.mathslideshows.com/
I haven't had time to post everything yet on TpT but I plan to very soon. Thank you for following me!
Thank you for following me. I am new to TpT. I am now following you too!
I have over 300 Powerpoint slideshows available on my website:
http://www.mathslideshows.com/
I haven't had time to post everything yet on TpT but I plan to very soon. Thank you for following me!
November 1, 2011
Showing 1-1 of 1
TEACHING EXPERIENCE
I taught junior high school Math for the last 13 years. This includes teaching 6th grade Math, 7th grade Pre-Algebra, 8th grade Algebra, 8th grade Basic Math, and Algebra Readiness intervention classes. I can tell you that developing interactive slideshow Math lessons on each topic taught in Math has been a huge motivator for student participation, student involvement & interaction. With the birth of my 3rd son I recently transferred to my boy's school. I am now a first year KINDERGARTEN teacher and loving every minute of it! I teach my very own son who is in my class, and I get to volunteer in my first grade son's class every week! YIPPEEE!!!
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