Cubes. Nets (3D Models)
Area of Circle, Triangle, Square, Rectangle, Parallelogram, Trapezium, Ellipse and Sector. Area is the size of a surface! Learn more about Area, or try the Area Calculator. Example: What is the area of this rectangle? The formula is: Area = w × h w = width h = height We know w = 5 and h = 3, so: Area = 5 × 3 = 15 Example: What is the area of this circle? Radius = r = 3 Example: What is the area of this triangle? Height = h = 12 Base = b = 20 Area = ½ × b × h = ½ × 20 × 12 = 120 A harder example: Example: Sam cuts grass at $0.10 per square meter How much does Sam earn cutting this area: Let's break the area into two parts: Part A is a square: Area of A = a2 = 20m × 20m = 400m2 Part B is a triangle. Area of B = ½b × h = ½ × 20m × 14m = 140m2 So the total area is: Area = Area of A + Area of B = 400m2 + 140m2 = 540m2 Sam earns $0.10 per square meter Sam earns = $0.10 × 540m2 = $54.
Prisms with Examples. Teaching in Room 6: Legos + Volume = Awesome! OK...so we just got home from seeing the Lego Movie and I just HAD to redo the title of this post. Have you seen it? Super cute! Anyway...back to the regularly scheduled post. Do you ever have an AWESOME lesson idea at home, plan it out, knowing it will be super fabulous, only to have it fall short when you actually implement it in class?? Yeah...that is what happened at the beginning of this week. You see, I had this fabulous idea to have the kids construct buildings using the bazillion Lego bricks I had at home, then measure the buildings to find the volume of the entire thing. Additive volume, measuring, problem solving....the whole shebang. So I brought all of the materials into class, had the kids get into groups, explained what I wanted done, modeled it, and the kids were off. Here is where it all melted down.
Here are a few of the completed structures so you can get an idea of the format with which I wanted them to build. and many more things. So there you have it. Surface area and volume project. 3D Math Volume Projects. GCSE Bitesize: Limits of accuracy - discrete measures. Finding the area of compound shapes. Area and Perimeter. Area of Compound Shapes (GGB) - Interactive Maths - The Interactive Way to Teach Mathematics. KS3 Bitesize Maths - Area : Revision, Page 5. Math 6 Spy Guys. How It's Made Cardboard Boxes.