## ◂Math Worksheets and Study Guides Eighth Grade. Perimeter and area

### The resources above cover the following skills:

Geometry
Unit 1: Congruence, Proof, and Constructions
Experiment with transformations in the plane.
Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notions of point, line, distance along a line, and distance around a circular arc.
Ability to use mathematical vocabulary accurately.
Unit 2: Similarity, Proof, and Trigonometry
Apply geometric concepts in modeling situations.
Use geometric shapes, their measures, and their properties to describe objects (e.g., modeling a tree trunk or a human torso as a cylinder).
See the skills and knowledge that are stated in the Standard.
Unit 3: Extending to Three Dimensions
Explain volume formulas and use them to solve problems.
Give an informal argument for the formulas for the circumference of a circle, area of a circle, volume of a cylinder, pyramid, and cone. Use dissection arguments, Cavalieri’s principle, and informal limit arguments.
See the skills and knowledge that are stated in the Standard.
Standards