About This Lesson
<p>Draw some isosceles triangles with an area of 9 cm squared and a vertex at (20,20). If all the vertices must have whole number coordinates, how many is it possible to draw?</p>Aligned to Common Core State Standard: 7.G.6
Standards
Solve real-world and mathematical problems involving area, volume and surface area of two- and three-dimensional objects composed of triangles, quadrilaterals, polygons, cubes, and right prisms.
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This is awesome! You need at least something like a projector for this to be any use, but next time I get a class in a computer room, I'm going to give this a whirl. It's brilliant the way the images of the correct triangles are 'frozen' on the grid and it auto-calculates the areas. You can adjust the target area too. Really: you should take a look at this one.