Isosceles Triangles
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5.0 (2 Reviews)
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Isosceles Triangles

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gemetric shapes
Subject Math — Geometry
Grade Level Grades 6-8
Standards Alignment
Common Core State Standards
License

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 Standards: 6.G.3, 7.G.2

Standards

Draw polygons in the coordinate plane given coordinates for the vertices; use coordinates to find the length of a side joining points with the same first coordinate or the same second coordinate. Apply these techniques in the context of solving real-world and mathematical problems.
Read More About CCSS.Math.Content.6.G.A.3
Draw (freehand, with ruler and protractor, and with technology) geometric shapes with given conditions. Focus on constructing triangles from three measures of angles or sides, noticing when the conditions determine a unique triangle, more than one triangle, or no triangle.
Read More About CCSS.Math.Content.7.G.A.2

Reviews

5.0
2 Reviews
SML Member
SML Member December 10, 2011

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.

hummelk
hummelk June 20, 2013

This is a really interesting interactive coordinate grid that will allow students to practice their area of triangle knowledge.

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