The purpose of this Warm-up is to familiarize students with an isometric grid, which will be useful when students transform figures on an isometric grid in a later activity. While students may notice and wonder many things, characteristics such as the measures of the angles in the grid and the diagonal parallel lines are the important discussion points. Students are not expected to know that each angle in an equilateral triangle is 60 degrees, but after previous experience with supplementary angles, circles, and rotations, they may be able to explain why each smaller angle is 60 degrees. Many things they notice may be in comparison to the square grid paper which is likely more familiar.

When students articulate what they notice and wonder, they have an opportunity to attend to precision in the language they use to describe what they see (MP6). They might first propose less formal or imprecise language, and then restate their observation with more precise language in order to communicate more clearly.