5 Minute Check Find the SA. Complete in your notebook. 1.2. 3.4

Tuesday, Oct 30

5 Minute CheckFind the SA. Complete in your notebook.1.2.

3.4.

5 Minute CheckFind the SA. Complete on homework.1.


SA = 2B + hpB = 5 x 7 = 35p = 5 + 7 + 5 + 7= 24h = 3SA = 235 + 3 24 = 142ft



SA = 2B + hp B = 12.7 x 8.1 = 102.87p = 12.7 + 8.1+12.7 +8.1= 41.6h = 4.3SA = 2102.87 + 4.3 41.6 = 384.62cm



SA = 2B + hp B = 4 x 5 = 20p = 4 + 5+4 +5= 18h = 12SA = 220 + 12 18 = 256in



SA = 2B + hp B = 35.7 x 25.5 = 910.35p = 35.7 + 25.5+35.7 +25.5= 122.4h = 15.1SA = 2910.35 + 15.1 122.4 = 3668.94m

Flashcards

Monday, Feb 24Chapter 10.4

Surface Areas of Triangular PrismsSurface Areas of Triangular PrismsObjective: To find the surface area of triangular prisms.

Surface Areas of Triangular PrismsAt the end of this lesson you should be able to answer the following question.

How is the area of a rectangle related to the surface area of a triangular prism?

Surface Areas of Triangular PrismsThe surface area (SA) of a three dimensional figure is the outer face or exterior boundary of the figure.

Surface Areas of Triangular PrismsThere are two ways to find the surface area of a shape.

1. Use a formula

2. Use a net

Surface Areas of Triangular PrismsThe formula to find the surface area (SA) of a triangular prism is 2 x Area of the Base + perimeter of the Base x height, or SA = 2B + ph

lwhSurface Areas of Triangular PrismsIn a triangular prism the Base is always a triangle. (and has the right angle sign)

lwhSurface Areas of Triangular PrismsIn a triangular prism the Base is always a triangle. The area of the Base will be l w 2.

lwhSurface Areas of Triangular PrismsIn a triangular prism the Base is always a triangle. The area of the Base will be l w 2.

l and w will always be connected by a rightangle.

lwhSurface Areas of Triangular PrismsFind the SA of the triangular prism. SA = 2B + hp

To find the SA of a prism.Step 1 Find the area of the Base. What is the area of the Base? (Remember, the Base will always be a triangle)

Surface Areas of Triangular PrismsFind the SA of the triangular prism. SA = 2B + hp B = 54

To find the SA of a prism.Step 1 Find the area of the Base. What is the area of the Base? 9 x 12 2 = 54

Surface Areas of Triangular PrismsFind the SA of the triangular prism. SA = 2B + hpB = 54

To find the SA of a prism.Step 2 Find the perimeter of the Base. What is the perimeter of the Base?

Surface Areas of Triangular PrismsFind the SA of the triangular prism. SA = 2B + hp B = 54p = 36To find the SA of a prism.Step 2 Find the perimeter of the Base. What is the perimeter of the Base?9 + 12 + 15 = 36

Surface Areas of Triangular PrismsFind the SA of the triangular prism. SA = 2B + hpB = 54p = 36

To find the SA of a prism.Step 3 Find the height. What is the only number that has not been used?

Surface Areas of Triangular PrismsFind the SA of the triangular prism. SA = 2B + hp B = 54p = 36h = 10To find the SA of a prism.Step 3 Find the height. What is the height? 10

Surface Areas of Triangular PrismsFind the SA of the triangular prism. SA = 2B + hp B = 54p = 36h = 10To find the SA of a prism.Step 4 Substitute and perform the operations.

Surface Areas of Triangular PrismsFind the SA of the triangular prism. SA = 2B + hp B = 54p = 36h = 10

SA = 2 54 + 36 10 = 468ft

Surface Areas of Triangular PrismsFind the SA of the triangular prism.

Do this on your own.

Surface Areas of Triangular PrismsFind the SA of the triangular prism. SA = 2B + hp

B = 5 x 2 2 = 5p = 5.4 + 2 + 5 = 12.4h = 4SA = 2 5 + 4 12.4 = 59.6ft




SA = 2B + hp

B = 5.2 x 6 2 = 15.6p = 6 + 6 + 6 = 18h = 7SA = 2 15.6 + 7 18 = 157.2cm




SA = 2B + hp B = 5.3 x 6 2 = 15.9p = 5.3 + 6 + 8 = 19.3h = 13

SA = 2 15.9 + 13 19.3 = 282.7cm




SA = 2B + hp B = 3 x 4 2 = 6p = 3 + 4 + 5 = 12h = 6

SA = 2 6 + 12 6 = 84cm

Surface Areas of Triangular PrismsTo find the surface area (SA) of a prism by using a net the area of each face is added together, like a composite shape.

Surface Areas of Triangular PrismsSince a triangular prism has 5 faces, there will be five areas to add.



What is the area of the outlined shapes?

Surface Areas of Triangular PrismsFind the SA of the triangular prism..4 + .4 What is the area of the outlined shapes?1 x .8 2 = .4

Surface Areas of Triangular PrismsFind the SA of the triangular prism..4 + .4 What is the area of the outlined shape?

Surface Areas of Triangular PrismsFind the SA of the triangular prism..4 + .4 + 2What is the area of the outlined shape?1 x 2 = 2

Surface Areas of Triangular PrismsFind the SA of the triangular prism..4 + .4 + 2What is the area of the outlined shape?

Surface Areas of Triangular PrismsFind the SA of the triangular prism..4 + .4 + 2 + 2What is the area of the outlined shape?1 x 2 = 2

Surface Areas of Triangular PrismsFind the SA of the triangular prism..4 + .4 + 2 + 2What is the area of the outlined shape?

Surface Areas of Triangular PrismsFind the SA of the triangular prism..4 + .4 + 2 + 2 + 2What is the area of the outlined shape?1 x 2 = 2

Surface Areas of Triangular PrismsFind the SA of the triangular prism..4 + .4 + 2 + 2 + 2What is the surface area of the prism?

Surface Areas of Triangular PrismsFind the SA of the triangular prism..4 + .4 + 2 + 2 + 2What is the surface area of the prism? 6.8 cm




42 + 42 + 12.5 + 7+ 12.5 =116in

Surface Areas of Triangular PrismsAgenda Notes

Homework Homework Practice 10-4Due Tuesday, Feb 25

Chapter 10 Test Wednesday, Feb 26

Documents

5 Minute Check Find the SA. Complete in your notebook. 1.2. 3.4