8th pre alg -l40-inv#4
TRANSCRIPT
Lesson 40.notebook November 11, 2013
Assignment:
1>Set 40 (evens) Due Tomorrow (11/12)
2>Test #5 signed??
Lesson 40.notebook November 11, 2013
Lesson 40 WarmUp:
1) Write 32% as a decimal and as a reduced fraction.
2) Combine like terms: xyz + yxz zyx x2yz
3) Expand: 4x(2x 9)
4) Simplify: 1/9 + 4/6 4/12
5) Find the perimeter:
10 feet
15 feet
12 feet
Lesson 40.notebook November 11, 2013
Lesson 40
*sector – a portion of the interior of a circle enclosed by two radii and an arc (a part of a circle)
*central angle – the angle formed by 2 radii and determines the fraction of the area of the circle the sector occupies
FYI...Area of a circle pi times radius squared x r2
Lesson 40.notebook November 11, 2013
Examples Lesson 40pg. 267A)
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C)
Lesson 40.notebook November 11, 2013
D)
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Lesson 40.notebook November 11, 2013
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Lesson 40.notebook November 11, 2013
Investigation #4 (vocab):
*geometric solids a 3D geometric figure
*faces a flat surface of a geometric solid
*edges a line segment formed where 2 faces of a geometric solid intersect
*vertex (vertices) a point where 2 edges of a geometric solid meet
*polyhedron a geometric solid whose faces are polygons
*prism a polyhedron with 2 congruent parallel bases
Lesson 40.notebook November 11, 2013
*pyramid a type of polyhedron with lateral surfaces that narrow to a point
*cylinder a geometric solid with 2 parallel bases that are circles
*cone a geometric solid with one circular base that connects to a point
*sphere a smooth curved solid, that has every point the same distance from its center