Identify and name polygons.

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Presentation transcript:

Identify and name polygons. Find perimeter, circumference, and area of two-dimensional figures. Splash Screen

Mathematical Practices 2 Reason abstractly and quantitatively. Content Standards G.GPE.7 Use coordinates to compute perimeters of polygons and areas of triangles and rectangles, e.g., using the distance formula. Mathematical Practices 2 Reason abstractly and quantitatively. 6 Attend to precision. CCSS

polygon equiangular polygon regular polygon perimeter circumference area vertex of a polygon concave convex n-gon equilateral polygon Vocabulary

Concept

Concept

Concept

Name and Classify Polygons A. Name the polygon by its number of sides. Then classify it as convex or concave and regular or irregular. B. Name the polygon by its number of sides. Then classify it as convex or concave and regular or irregular. Example 1

A. Name the polygon by the number of sides A. Name the polygon by the number of sides. Then classify it as convex or concave and regular or irregular. B. Name the polygon by the number of sides. Then classify it as convex or concave and regular or irregular. Example 1a

Concept

A. Find the perimeter and area of the figure. Find Perimeter and Area A. Find the perimeter and area of the figure. B. Find the circumference and area of the figure. Example 2

A. Find the perimeter and area of the figure. B. Find the circumference and area of the figure. Example 2a

A square with side length of 5 feet B circle with the radius of 3 feet Largest Area Terri has 19 feet of tape to mark an area in the classroom where the students may read. Which of these shapes has a perimeter or circumference that would use most or all of the tape? A square with side length of 5 feet B circle with the radius of 3 feet C right triangle with each leg length of 6 feet D rectangle with a length of 8 feet and a width of 3 feet Example 3

A. a rectangle with a length of 26 inches and a width of 18 inches Each of the following shapes has a perimeter of about 88 inches. Which one has the greatest area? A. a rectangle with a length of 26 inches and a width of 18 inches B. a square with side length of 22 inches C. a right triangle with each leg length of 26 inches D. a circle with radius of 14 inches Example 3

Perimeter and Area on the Coordinate Plane Find the perimeter and area of a pentagon ABCDE with A(0, 4), B(4, 0), C(3, –4), D(–3, –4), and E(–3, 1). Example 4

Find the perimeter of quadrilateral WXYZ with W(2, 4), X(–3, 3), Y(–1, 0), and Z(3, –1). Example 4

Homework Page 61 (11-22, 25, 29, 30, 31) Page 63 (34-39) CCSS