2. *Surface Area – the total area of the surface of a
three-dimensional object
*In order to find the total surface area of an
object, you must find the area of all its sides.
*Use your Chapter 12 Formula Sheet as a
reference.
3. * Rectangular Prism - A solid (three-dimensional)
object which has six faces that are rectangles.
It has the same cross-section along a length,
which makes it a prism.
* SA = 2푙푤 + 2ℎ푤 + 2푙ℎ
* 푙 = 7.9 푐푚 푤 = 4.5 푐푚 ℎ = 4.0 푐푚
*
4. * Rectangular Prism - A solid (three-dimensional)
object which has six faces that are rectangles. It
has the same cross-section along a length, which
makes it a prism.
* SA = 2푙푤 + 2ℎ푤 + 2푙ℎ
* 푙 = 7.9 푐푚 푤 = 4.5 푐푚 ℎ = 4.0 푐푚
* 푆퐴 = 2 7.9 4.5 + 2 4.0 4.5 + 2(7.9)(4.0)
* 푺푨 = ퟏퟕퟎ. ퟑ 풄풎ퟐ
*
5. *Cylinder - a solid geometric figure with straight
parallel sides and a circular or oval cross
section.
*푆퐴 = 2휋푟2 + 2휋푟ℎ
*푟 = 5 푦푑 ℎ = 12 푦푑
*
6. *Cylinder - a solid geometric figure with straight
parallel sides and a circular or oval cross
section.
*푆퐴 = 2휋푟2 + 2휋푟ℎ
*푟 = 5 푦푑 ℎ = 12 푦푑
*푆퐴 = 2휋(5)2 + 2π(5)(12)
*푺푨 = ퟓퟑퟒ. ퟏ 풚풅ퟐ
*
7. *Triangular Prism - a three-sided prism; it is a
polyhedron made of a triangular base, a
translated copy, and 3 faces joining corresponding
sides.
*푆퐴 = 푃ℎ + 2퐵
*푃 = 5 + 4 + 7 = 16m
*퐵 =
*
1
2
7 2.8 = 9.8푚
*ℎ = 6푚
8. *Triangular Prism - a three-sided prism; it is a
polyhedron made of a triangular base, a translated
copy, and 3 faces joining corresponding sides.
*푆퐴 = 푃ℎ + 2퐵
*푃 = 5 + 4 + 7 = 16m
*퐵 =
*
1
2
7 2.8 = 9.8푚
*ℎ = 6푚
*푆퐴 = 16 6 + 2 9.8
*푺푨 = ퟏퟏퟓ. ퟔ 풎ퟐ
9. *Cone - a solid or hollow object that tapers
from a circular or roughly circular base to a
point.
*푆퐴 = 휋푟푠 + 휋푟2
*푟 = 5푐푚 푠 = 11푐푚
*
10. *Cone - a solid or hollow object that tapers
from a circular or roughly circular base to a
point.
*푆퐴 = 휋푟푠 + 휋푟2
*푟 = 5푐푚 푠 = 11푐푚
*푆퐴 = 휋 5 11 + 휋(5)2
*푺푨 = ퟐퟓퟏ. ퟑ 풄풎ퟐ
*
11. *Pyramid - a monumental structure with a
square or triangular base and sloping sides that
meet in a point at the top
*푆퐴 = 2푏푠 + 푏2
*푏 = 7푓푡 푠 = 8.7푓푡
*
12. *Pyramid - a monumental structure with a
square or triangular base and sloping sides that
meet in a point at the top
*푆퐴 = 2푏푠 + 푏2
*푏 = 7푓푡 푠 = 8.7푓푡
*푆퐴 = 2 7 8.7 + (7)2
*푺푨 = ퟏퟕퟎ. ퟖ 풇풕ퟐ
*
