Presentation on theme: "Unit 3: The Building Blocks of Geometry"— Presentation transcript:
1Unit 3: The Building Blocks of Geometry Suggested ActivitiesUnit 3: The Building Blocks of Geometry
2Problem Solving in Geometry Area, Surface Area, Volume, and PerimeterProblem Solving in Geometry
3Station 1 The “Transparent Blue Prism” Problem How many faces are there?Find the area of each face. Use a ruler to estimate its dimensions to the nearest tenth of an inch.What’s the total surface area of the object?What percentage of the prism’s surface area is composed of the left and right faces?
4Station 2Find the area of one shaded corner. You may need to refer to recent formulas for circles, rectangles/squares, or parallelograms.12 meters
5Station 3170.6 inches65.3 inches inches120 inchesFind the area of the figure below. Try dissecting it into more familiar shapes.Hint: You may need to use the Pythagorean Theorem.40.5 in97.7 in41.2 in61.3 in
6Station 4Using a ruler, estimate the area of this irregular figure. Be sure to provide the correct label. What units did you use?Why is your estimate not a precise computation? What other methods could you use to estimate the area of the figure?
7Station 5Sherie & Kayla want to enclose their pool area with a fence. They have a rectangular inground pool that measures 30 feet long by 18 feet wide.If the stone walkway needs to be 4 feet wide, how much fencing do they need?What is the area of the stone walkway?What percentage of the pool area is composed of the walkway?
8Exit Ticket Assume all three chicken nuggets are of the same dimensions.Estimate the surface area of a single chicken nugget using the method of your choice.Using your estimation, calculate the combined surface area of the three chicken nuggets including the missing bite!1.4”0.87”0.3”
10Schema ActivatorA series of four images follow. You will be given seconds to study the image before it disappears. Your task is to draw the image from memory on the paper your teacher has supplied you! Your teacher may choose to return to the image once or twice more before moving on to the next one. Look quickly!
19Schema Activator Quick Images For each image, what did you notice the first time you saw the shape? What features were in your first pictures?What did you miss when you first saw each shape? How did you revise your pictures?
20Something to ConsiderIn his book How to Solve It, George Polya passes on a famous piece of mathematical wisdom, “Geometry is the science of correct reasoning on incorrect figures.” It’s a nice phrase, but the fact is that picturing – both on paper and in your mind – is an important part of geometric reasoning. People can learn the mathematics of making accurate drawings, drawings from which you can reason. People can also learn to pay more attention to the geometry they see and to visualize with their minds.
21Mission 1 Familiarize yourself with the pattern blocks. Which shapes do you recognize? Can you name them?Other Introductory Extensions in the Classroom:Pair up students and have one student design their own figure. The other student takes directives from the designer and attempts to re-create the figure/pattern using only verbal instructions that do not refer to colors! Students should practice proper vocabulary use.
22Mission 2Figure out the measures of each of the angles in all six of the pattern blocks.Here are the rules:Don't use what you might know about the sum of the angles in polygons. Imagine that you know only what a fourth grader knows.You can use the fact that 360 degrees make a circle.You may use the measures of angles you already figured out as comparison.Try to figure out the angles for each shape multiple ways.Be prepared to share.
23Area, Circumference, Radii and Diameter Review of CirclesArea, Circumference, Radii and Diameter
24What do you remember about circles? Write the formula for the area of a circle.Write the formula for the circumference of a circle (in two different ways):Given diameterGiven radiusCalculate the area of the circle.Calculate the circumference of the circle.5cm10cmSchema Activator
25A circle has a circumference of 57. 64 ft. What is it’s area A circle has a circumference of ft. What is it’s area? Show all work.A circle has an area of 82 in2. What is the circle’s radius?A circle has an area of 140 in2. What is the circle’s diameter?What is the area of this semi-circle?24 mMore Examples
26Schema Activator…from 37,000 feet. Estimate the sum of the area of the two green-shaded regions of the circles, given that the diameter of each circle is 1,200 feet.
27Schema Activator: Traffic Cones To prevent the cones from falling over when crazy drivers (aka Ashley, Carlton, and Devon) hit them with their cars, the cones are filled with sand to make them heavier. If the height of the cone is 16” and the radius is 4”, how much sand will be needed to fill the cone? Round to the nearest tenth.A hole is found in the cone and sand isleaking at a rate of 37 cubic inches/minute. How long will it take before the cone isempty? Round to the nearest tenth.
28Introduction to Proof Essential Questions: What is proof? What is it used for?How can it be used to prove triangles are congruent?
29Schema Activator Create a two-column proof (fold your paper in half.) Refer to the example from last class.Prove: If Mike “The Situation” Sorrentino gets a flat tire, then he will be late getting to Seaside Heights for the filming of the show.