Lesson-4.1.2- Use and interpret the vocabulary of: ??? triangles ??? special quadrilaterals ??? polygons ??? nets ??? solids. Includes the following terms. Triangles: ??? equilateral ??? isosceles ??? scalene ??? right-angled. Quadrilaterals: ??? square ??? rectangle ??? kite ??? rhombus ??? parallelogram ??? trapezium. Polygons: ??? regular and irregular polygons ??? pentagon ??? hexagon ??? octagon ??? decagon. Solids: ??? cube ??? cuboid ??? prism ??? cylinder ??? pyramid ??? cone ??? sphere ??? hemisphere ??? frustum ??? face ??? surface ??? edge