PHET
Area Builder
All that matters is the tiles. Pupils use the interactive to investigate the relationship between area and perimeter using tiles. The interactive has an explore and a game mode to accommodate different steps in learning. The game mode...
Curated OER
Rectangle & Square Problems - Length, Width, Perimeter and Area
In this online math worksheet, students determine the length and width of given rectangles given their area. This excellent resource allows the students to check their answers, and to get "hints" should they run into difficulties. A...
Curated OER
Surface Area of Prism
Tenth graders are provided instructions, including a video, on calculating the surface area of a prism. The one-page interactive worksheet contains two worked questions. Answers are included.
Curated OER
Spark Notes Review of Geometry
In this geometry worksheet, learners are given the side lengths of polygons and asked to calculate the perimeter, area and shaded region. There are 30 questions with an answer key.
Curated OER
Rhombi and Squares Multiple Choice
In this geometry worksheet, students identify the missing parts of polygons. They use algebra to solve the equations using the rules of polygons. There are 5 questions with an answer key.
Curated OER
Parallelogram Problems
For this online math worksheet, high schoolers solve a variety of geometry problems which utilize parallelograms. This excellent resource allows the students to check their answers, and to get "hints" should they run into difficulties. A...
Curated OER
My Test Book: Geometry Skills 2
For this online interactive math skills worksheet, students solve 10 multiple choice math problems regarding geometry skills. Students may submit their answers to be scored.
Curated OER
Coordinate Geometry
In this geometry worksheet, learners calculate the midpoint and distance between two points. They use the correct formula to solve the area and perimeter of polygons. There are 20 multiple choice questions with an answer key.
Shodor Education Foundation
Shodor Interactivate: Perimeter Explorer
Use this applet to find the perimeter of a variety of shapes with the same or different areas.
Calculator Soup
Calculator Soup: Regular Polygon Calculator
Use this calculator to calculate properties of a regular polygon. Enter any 1 variable plus the number of sides or the polygon name. Calculates side length, inradius, circumradius, area, and perimeter.
Calculator Soup
Calculator Soup: Square Calculator
Use this square calculator to find the side length, diagonal length, perimeter, or area of a geometric square. Given any 1 variable you can calculate the other 3 unknowns.
Math Playground
Math Playground: Geometry Board
Create polygons by stretching bands over pegs on this geometry board. Then find the area and perimeter of the shape you created.
Calculator Soup
Calculator Soup: Rectangle Calculator
Use this calculator if you know 2 values for the rectangle, including 1 side length, along with area, perimeter, or diagonals and you can calculate the other 3 rectangle variables. A square calculator is a special case of the rectangle...