Latest updates for Geometry

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Recent items include:

  • Teaching Geometry in Elementary School: Shapes, Area & Perimeter
  • Comparing the area of a parallelogram and pentagon
  • Straightedge-only construction II

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whatihavelearnedteaching.com /1 week ago

Teaching Geometry in Elementary School: Shapes, Area & Perimeter

Geometry can feel like the easiest math unit to teach because students already know what a square looks like. But teaching geometry in elementary school well means going beyond sha...

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puzzling.stackexchange.com /2 weeks ago

Comparing the area of a parallelogram and pentagon

In the image: ABCDE is a regular pentagon F, A, B are colinear G, E, C are colinear FA has half the length of EC BCGF is a parallelogram Which area is bigger: the regular pentago...

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puzzling.stackexchange.com /2 weeks ago

Straightedge-only construction II

Take two arbitrarily sized regular triangles, $\triangle ABC$ and $\triangle CDE$ as shown in the figure. $B$, $C$, $E$ are collinear Construct the centroid of $\triangle ABC$ and...

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css-tricks.com /1 month ago

Making Complex CSS Shapes Using shape()

Creating rectangles, circles, and rounded rectangles is the basic of CSS. Creating more complex CSS shapes such as triangles, hexagons, stars, hearts, etc. is more challenging but...

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puzzling.stackexchange.com /3 weeks ago

Straightedge-only construction

Take two squares, $\square ABED$ and $\square FBCG$ such that $A$, $B$, and $C$ are on a line and $D$, $E$, $F$, and $G$ are on the same side of line $AC$ and $a=AB, b=BC$. Questi...

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Sources covering Geometry

css-tricks.com

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puzzling.stackexchange.com

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whatihavelearnedteaching.com

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