Interior angles in a triangle add up to 180°. Interior angles in a quadrilateral add up to 360°. Symmetry and 2D shapes Parts of a shape on either side of a line of symmetry will be exact mirror ...

A shape has a line of symmetry when the folded part sits perfectly on top with all edges matching. The number of lines of symmetry in a regular polygon is equal to the number of sides. A shape has ...

Big Idea – We can describe, measure, and compare spatial relationships. to build on students' knowledge of triangle and develop students' reasoning with properties of different classes of triangles to ...

By controlling the number of layers and the fiber angles, the laminate may have its mechanical properties tailored to specific tasks. The diagram shows typical fiber directions in a multi-layer ...