**http://thinkzone.wlonk.com/MathFun/Triangle.htm**

GSS - Circle through 3 points Drawing a circle through three given points with compass and straightedge 1. Draw the only circle that passes through the three points below. 2. Draw the only circle that passes through the three points below. It seems like ages since my last gems post. School has been busier than I anticipated. This week I had reports to write and a Parents' Evening to attend - both tasks were particularly challenging because I've only been teaching these classes for a few weeks. I've also been marking at home every evening so it's hard to find time for Twitter and blogging. I have three other posts in draft - one about teaching quadratics, one about spontaneity and one featuring another batch of highlights from Chris Smith's newsletter back catalogue. So watch this space, they're all coming soon!

Geometry Cool Free Online Math Games for Kids Play these Geometry Games to practice and reinforce your geometry skills the fun way. CCSS: 4.MD.C.5The balloons are coming in from all directions. Figure out the direction in degrees that the cannon needs to point and pop the balloons before they get too close. CCSS: 4.G.A.2, MP6MathPup is at Scruffy's Lab trying out his new device that can see outlines of shapes through steel. GSS - Constructions Introduction to constructions Constructions: The drawing of various shapes using only a pair of compasses and straightedge or ruler. No measurement of lengths or angles is allowed. Hello and welcome to my 24th gems post - this is where I share 5 teaching ideas I've seen on Twitter. I'm going to be short and sweet today... I'm meant to be marking! 1. Angles in Parallel Lines I'm always on the look out for good questions that I can use in class so I was pleased when Cliff Pickover (@pickover) tweeted the problem below.

Geometry for Kids! The simplest geometric idea is the point, and then the line, the plane, and the solid. Shapes like circles, squares, rectangles, and triangles are flat, and we can think of them as being parts of a plane, flat like a drawing. Shapes like spheres, cubes, and pyramids are solid, and we can think of them as being part of the whole universe - as indeed any real object is. GSS - Rotational Symmetry Maths Rotational Symmetry Symmetry means balance or form. Hello and welcome to my 26th maths gems - this is where I share teaching ideas and resources I've seen on Twitter. There's a lot going on this week - exciting times for maths teachers! Pi Day is fast approaching and it's a big one this year - 3.14.15.

Shape and Space in Geometry The National Council of Teachers of Mathematics recognizes the importance of geometry and spatial sense in its publication Curriculum and Evaluation Standards for School Mathematics (1989). Spatial understandings are necessary for interpreting, understanding, and appreciating our inherently geometric world. Insights and intuitions about two- and three-dimensional shapes and their characteristics, the interrelationships of shapes, and the effects of changes to shapes are important aspects of spatial sense. Children who develop a strong sense of spatial relationships and who master the concepts and language of geometry are better prepared to learn number and measurement ideas, as well as other advanced mathematical topics. (p. 48)

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