surface area review and quiz 1
TRANSCRIPT
Lesson 10.5, For use with pages 548-552
Write the area formulas for:• Square• Rectangle• Parallelogram• Triangle• Trapezoid• Circle
ReviewReview
When labeling any area, always use When labeling any area, always use _____ _._____ _.
Finding the area of all the faces of a Finding the area of all the faces of a polyhedron is called _______ _______.polyhedron is called _______ _______.
What is the definition of a polyhedron?What is the definition of a polyhedron?
_______
When labeling any area, always use When labeling any area, always use _____ ________._____ ________.
Finding the area of all the faces of a Finding the area of all the faces of a polyhedron is called _______ _______.polyhedron is called _______ _______.
What is the definition of a polyhedron?What is the definition of a polyhedron?– is a solid that is enclosed by polygons. It has is a solid that is enclosed by polygons. It has
only flat surfaces.only flat surfaces.
units squared
surface area
GUIDED PRACTICE for Examples 1, 2 and 3
Classify the solid. Then tell whether it is a polyhedron.
1. 2.
GUIDED PRACTICE for Examples 1, 2 and 3
Classify the solid. Then tell whether it is a polyhedron.
1. 2.
triangular pyramid; polyhedron.
ANSWERCone; not a polyhedron.
ANSWER
GUIDED PRACTICE
3.
for Examples 1, 2 and 3
Classify the solid. Then tell whether it is a polyhedron.
4.
GUIDED PRACTICE
3.
octagonal prism; polyhedron.
ANSWER
for Examples 1, 2 and 3
Classify the solid. Then tell whether it is a polyhedron.
4.
ANSWER
sphere; not a polyhedron
EXAMPLE 2 Counting Faces, Edges, and Vertices
SOLUTION
The solid is a pentagonal pyramid.
Classify the solid. Then count the number of faces, edges, and vertices.
Remember to include the base when counting faces.
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.
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.
cylinder; 29.8 m2ANSWER
GUIDED PRACTICE
ANSWER
for Examples 1, 2, 3, and 4
The area of each triangle is 6 m · 8 m = 24 m2 The area of the large rectangle is 10m · 14m = 140m2
The area of the small rectangle is 6 m · 14 m = 84 m2
The area of the middle rectangle is 8 m · 14 m = 112 m2
The total area is 2 · 24m2 + 140m2 + 84m2 + 112m2= 384 m2
12
Identify the solid shown by the net.
Then find its surface area.
HomeworkHomework
Page 552 #35-37 AND page 570 #14-17Page 552 #35-37 AND page 570 #14-17