For the last few weeks we have been working on Trigonometry in all of my classes.  I put together a project to help apply all of these Trigonometric rations (SOH CAH TOA) to good use in the real world.  Students measured their heights and their shadow lengths to determine the angle of elevation of the sun.  Then they used that angle along with the shadow lengths of some very tall objects (the building, light poles, the victory bell, etc) to determine the height of those tall objects.  We had a little bit of difficulty during 6th period as the weather didn’t want to cooperate with us (darn those clouds hiding the sun)!  Here are a few of the awesome drawings I got!    

SOH     Sine = Opposite over Hypotenuse.        

CAH    Cosine = Adjacent over Hypotenuse.  

TOA    Tangent = Opposite over Adjacent.      

Some Old Hippie, Came  A Hoppin, Through Our Apartment!!

Today we looked at the Surface Area of Cylinders.  Remember when you break a cylinder down it is really just two Circles and one Rectangle.  The base of the Rectangle is the Circumference of the Circle.

Yes it is a Toilet Paper roll!

The Three parts of a Cylinder

Today we looked at Surface Area of Prisms and we created our own Rectangular Prisms.  Remember, when we take a Prism and break it down to its polygon parts it is called a Net.

Net of a Rectangular Prism

Rectangular Prism

Rectangular Prism

In Geometry Skills we have been learning all about Quadrilaterals the last few weeks.  We are testing today, so students created Flip Books to review all of the special properties of Quadrilaterals (Parallelograms, Rhombus, Rectangles, Squares, & Trapezoids).  Students will be allowed to use their fantastic Flip Books on their test, so the more work they put into them, the more they will get out of it!!

In Geometry Skills B we have been learning all about parallelograms.  Today students created their own parallelograms using straws and paper clips.  They traced their parallelograms onto their papers and then measured the sides, diagonals, and angles to prove the theorems we have learned.  Finally they drew two congruent diagonals and created a  parallelogram from the diagonals.  Here are a few of their results. Enjoy!

I am saying goodbye to most of my Geometry students and Hello today to my new Geometry Skills Students.  I am sad to see my First Semester group leave, but I am excited to meet a new group of students.  Welcome!!