Then, in Section 11.3, you will look at the cross-sections of a cone, called conic sections and learn about the geometric properties of parabolas.? Mathematically proficient students use appropriate tools strategically. In Section 11.2, you will expand your study of solids to pyramids, cones, and spheres. In Section 11.1, you will study three-dimensional solids and their volumes, and you will apply your knowledge of similar figures to three-dimensional figures. For example, you have tools to calculate the measure of an interior angle of a regular hexagon, to calculate the length of the hypotenuse of a right triangle, to measure the perimeter of a triangle, and to find the area of a circle. You have investigated the special properties of triangles, parallelograms, regular polygons and circles, and have developed tools to help you describe and analyze those shapes. 2 CHAPTER 11 Solids In your study of geometry so far, you have focused your attention on two-dimensional shapes.
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