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 ...

Three lines of symmetry on an equilateral triangle. Right-angled triangles follow the same rules as other triangles. It's not the right angle that matters but whether the triangle is scalene or ...

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 ...