Covering and Surrounding: Investigation 2: Changing Area, Changing Perimeter
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Covering And Surrounding
• Hooda Geometry Games
• Worsley School Scale Factors
• Library of Virtual Manipulatives
• Geoboard – Use geoboards to illustrate area, perimeter, and rational number concepts. Geoboard - Circular – Use circular geoboards to illustrate angles and degrees. Geoboard - Coordinate – Rectangular geoboard with x and y coordinates. Geoboard - Isometric – Use geoboard to illustrate three-dimensional shapes.

Practice identifying types of triangles: obtuse, right, isoleses and equilateral. Learn how to find the area of a triange and use the Pythagoran Theorem to find the length of the hypotenuse.

Identify different polygons. Learn to find the perimeter of a rectangle and the area of a rectangle.

Circle: find the circumference and the area.

Review what you've learned about geometry

Area and Perimeter

### Covering and Surrounding

Concept with Explanation
Selected Homework from ACE

In Covering and Surrounding student work with investigations leads them to:

• Understand area and relate area to covering a figure;

• Understand perimeter and relate perimeter to surrounding a figure;

• Develop strategies for finding areas and perimeters of rectangular shapes and non-rectangular shapes;

• Discover relationships between perimeter and area. including that each can vary while the other stays fixed;

• Understand how the areas of simple geometric figures relate to each other (e.g. the area of a parallelogram is twice the area of a triangle with the same base and height);

• Develop formulas and procedures-stated in words and/or symbols-for finding areas and perimeters of rectangles, parallelograms, triangles, and circles;

• Develop techniques for estimating the area and perimeter of an irregular figure; and

• Recognize situations in which measuring perimeter or area will help answer practical questions.

 Vocabulary
 Picture Vocabuary angle Circle radius diameter pi circumference area perimeter base height length width