1. Holt Geometry 9-3 Composite Figures Warm Up Find the area of each figure. 1. a rectangle in which b = 14 cm and h = 5 cm 2. a triangle in which b = 6 in. and h = 18 in. 3. a trapezoid in which b 1 = 7 ft, b 2 = 11 ft, and h = 3 ft

2. Holt Geometry 9-3 Composite Figures Use the Area Addition Postulate to find the areas of composite figures. Use composite figures to estimate the areas of irregular shapes. Objectives

3. Holt Geometry 9-3 Composite Figures A composite figure is made up of simple shapes, such as triangles, rectangles, trapezoids, and circles. To find the area of a composite figure, find the areas of the simple shapes and then use the Area Addition Postulate.

4. Holt Geometry 9-3 Composite Figures Find the shaded area. Round to the nearest tenth, if necessary.

5. Holt Geometry 9-3 Composite Figures Find the shaded area. Round to the nearest tenth, if necessary.

6. Holt Geometry 9-3 Composite Figures Find the shaded area. Round to the nearest tenth, if necessary.

7. Holt Geometry 9-3 Composite Figures Find the shaded area. Round to the nearest tenth, if necessary.

8. Holt Geometry 9-3 Composite Figures Find the shaded area. Round to the nearest tenth, if necessary.

9. Holt Geometry 9-3 Composite Figures Find the shaded area. Round to the nearest tenth, if necessary.

10. Holt Geometry 9-3 Composite Figures To estimate the area of an irregular shape, you can sometimes use a composite figure. First, draw a composite figure that resembles the irregular shape. Then divide the composite figure into simple shapes.

11. Holt Geometry 9-3 Composite Figures Use a composite figure to estimate the shaded area. The grid has squares with a side length of 1 ft.

12. Holt Geometry 9-3 Composite Figures Use a composite figure to estimate the shaded area. The grid has squares with side lengths of 1 ft.

13. Holt Geometry 9-3 Composite Figures Lesson Quiz: Part I Find the shaded area. Round to the nearest tenth, if necessary. 1. 2.

14. Holt Geometry 9-3 Composite Figures Lesson Quiz: Part II 3.Mike is remodeling his kitchen. The countertop he wants costs $2.70 per square foot. How much will Mike have to spend on his remodeling project?

15. Holt Geometry 9-3 Composite Figures Lesson Quiz: Part III 4.Use a composite figure to estimate the shaded area. The grid has squares with side lengths of 1 cm.

16. Holt Geometry 9-3 Composite Figures Homework pg 609 2-20 evens 38-42evens