Area Formulas
Area of polygons
Surface Area and Nets
Surface Area and nets
100
what is the area formula for a square?
S X S
L X W
100
Find the area of the square with a side length of 2
4
100
Find the surface area
468 m2
100
What am I?
Clue 1: This net is made up of 1 rectangle and 2 circles. Clue 2: When assembled, the rectangle forms the lateral surface and the circles form the two bases.
Cylinder
200
what is the area formula for a rectangle
L X W
200
What am I?
Clue 1: This net consists of 4 triangles and 1 square. Clue 2: The square serves as the base, and the triangles meet at a single point.
Square Pyramid
200
What am I?
Clue 1: This net consists of 3 rectangles and 2 triangles. Clue 2: The triangles serve as the bases, and the rectangles form the lateral faces.
Triangular Prism
300
How do you find the area of a trapezoid?
break it up into triangles and rectangles
300
find the area of a triangle with a base of 10 and a height of 20
100
300
Find the surface area
216 ft2
300
How much wrapping paper is needed to wrap the gift below?
10 x 10 = 100
12 x 10 divided by 2 = 60
100 + 60 + 60 + 60 +60 = 340 cm2
400
what is the area formula for a triangle?
bxh/2
400
Find the area of the rectangle with a width of 8 and length of 7
56
400
Use the net to find the surface area of the solid below.
Square base (36) + Each triangle (27) (include all four)
36 + 27 + 27 + 27 + 27 = 144 ft2
36 + (4 x 27) = 144 ft2
400
Darianis is building a model skate park she starts by making a plastic ramp below.
How much plastic is needed to build the model ramp below?
Front rectangle (90) + Right Rectangle (72) + Left Rectangle (54) + Top Triangle (24) + Bottom Triangle (24)
90 + 72 + 54+ 24 + 24 = 264 cm2
500
area formula for Parrellelogram
bxh
500
What is the area of a trapezoid with a
b1- 2
b2-5
H-10
35
500
Maddie bought a gift for her friend. She wants to place the gift in a package with the length of 9 inches, width of 12 inches, and height of 4 inches. Then she wants to wrap the gift. What is the surface area of the package?
All the sides =
12 x 4
12 x 9
9 x 4
Then multiply each by two because they each have a matching side.
384 m2
500
How much paint is needed to paint the statue below?
Credit: https://www.slideshare.net/Kim199/surface-area-of-triangular-prism-1
Front Triangle (49.5) + Back Triangle (49.5) + Left Rectangle (192) + Right Rectangle (192) + Bottom Rectangle (144)
49.5 + 49.5 + 192 + 192 + 144 = 627 m2