Each angle is 60°. Image caption, An equilateral triangle has three lines of symmetry. There are three ways the triangle can be cut into a pair of mirrored halves. Each line of symmetry goes ...

Properties of symmetry ... (typical responses: colour, thicker line segments, two are closer together) "Is there anything the same?" (typical responses: size, all triangles, all coloured, all have ...

Take an equilateral triangle and extend its sides out across the page. Now, draw an arc centred on a corner of your choice, connecting the two lines… Receive a weekly dose of discovery in your ...

Big Idea – We can describe, measure, and compare spatial relationships. to build on students' knowledge of line symmetry and develop students' reasoning with properties of symmetry to develop an ...