bell ringer find the surface area of each figure. sa = 2lw + 2lh + 2wh sa = 2(4*2) + 2(4*3) + 2(2*3)...
TRANSCRIPT
Bell RingerBell RingerFind the surface area of
each figure.
SA = 2lw + 2lh + 2whSA = 2(4*2) + 2(4*3) + 2(2*3)
SA = 16 + 24 + 12
SA = 52 units²
SA = Area of Base + 4 (1/2(b)(h)
SA = 7*7 + 4 (1/2)(10*7)
SA = 49 + 140
SA = 189 units²
3.14 Surface Area: Cylinders and 3.14 Surface Area: Cylinders and ConesCones
Cylinder : a solid with two congruent parallel circles as bases, joined by a curved, smooth lateral face
1. Draw the net for a cylinder.1. Draw the net for a cylinder.
2. What are the length and the 2. What are the length and the width of the rectangle that is width of the rectangle that is formed when you unroll the formed when you unroll the cylinder?cylinder?
Length = circumference/perimeter
Width = height
1. Cylinder 2. Triangular prism1. Cylinder 2. Triangular prismWhat is the lateral surface area formula
for both a prism and a cylinder?
LA = Perimeter of circle/triangle * height P=perimeter/circumference
3. 56 3. 56 π in², 88 in², 88 π in² in²
4. 320 ft², 344 ft²4. 320 ft², 344 ft²
Is a cone a Is a cone a polyhedron?polyhedron?
Cone: a solid with one base that is a circle, and a curved lateral surface
comes to a point.
No, because it has a curved lateral surface area.
HomeworkPg. 244-245
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