Surface area review and quiz   1
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Surface area review and quiz 1 Presentation Transcript

  • 1. Lesson 10.5, For use with pages 548-552Write the area formulas for: • Square • Rectangle • Parallelogram • Triangle • Trapezoid • Circle
  • 2. Review
  • 3. When labeling any area, always use_____ _. _______Finding the area of all the faces of apolyhedron is called _______ _______.What is the definition of a polyhedron?
  • 4. When labeling any area, always use_____ ________.units squaredFinding the area of all the faces of apolyhedron is called _______ _______. surface areaWhat is the definition of a polyhedron?– is a solid that is enclosed by polygons. It has only flat surfaces.
  • 5. GUIDED PRACTICE for Examples 1, 2 and 3Classify the solid. Then tell whether it is a polyhedron. 2. 1.
  • 6. GUIDED PRACTICE for Examples 1, 2 and 3Classify the solid. Then tell whether it is a polyhedron. 2. 1. ANSWER ANSWER triangular pyramid; Cone; not a polyhedron. polyhedron.
  • 7. GUIDED PRACTICE for Examples 1, 2 and 3Classify the solid. Then tell whether it is a polyhedron. 3. 4.
  • 8. GUIDED PRACTICE for Examples 1, 2 and 3Classify the solid. Then tell whether it is a polyhedron. 3. 4. ANSWER ANSWER octagonal prism; sphere; polyhedron. not a polyhedron
  • 9. EXAMPLE 2 Counting Faces, Edges, and Vertices Classify the solid. Then count the number of faces, edges, and vertices. SOLUTION The solid is a pentagonal pyramid. Remember to include the base when counting faces.
  • 10. Daily Homework Quiz For use after Lesson 10.4 Identify the solid shown by the net. Then find its surface area. Use 3.14 for π. Round to the nearest tenth.
  • 11. Daily Homework Quiz For use after Lesson 10.4 Identify the solid shown by the net. Then find its surface area. Use 3.14 for π. Round to the nearest tenth. ANSWER cylinder; 29.8 m2
  • 12. GUIDED PRACTICE for Examples 1, 2, 3, and 4 Identify the solid shown by the net. Then find its surface area. ANSWERThe area of each triangle is 1 6 m · 8 m = 24 m2 2The area of the large rectangle is 10m · 14m = 140m2The area of the small rectangle is 6 m · 14 m = 84 m2The area of the middle rectangle is 8 m · 14 m = 112 m2The total area is 2 · 24m2 + 140m2 + 84m2 + 112m2= 384 m2
  • 13. HomeworkPage 552 #35-37 AND page 570 #14-17