Do Now: March 30th A square has vertices (1,7), (1,2), (6,7), and (6,2). What is the area of the square? How can you find the area of the square without.

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Presentation transcript:

Do Now: March 30th A square has vertices (1,7), (1,2), (6,7), and (6,2). What is the area of the square? How can you find the area of the square without drawing the square in a coordinate plane? Explain. 25 units 2 : The figure is a square so you only need the length of one side. Since this square is made of vertical and horizontal line segments you only need to find the length of one side by subtracting the x- coordinates or subtracting the y-coordinates.

Lesson 25: Nets and Surface Area March 30, 2016

Today’s Objectives: Represent three-dimensional figures using nets. Use nets to find the surface area of figures. Write equations that represent area problems. Solve problems involving the area of rectangles and triangles.

Notes Net Three DimensionalFigure Cube Face 3 SurfaceArea AreasFaces

25 in 2 Surface area =150 in 2 6 Faces at 25 in 2 each e x eore2e2 SA = 6 × e 2

Prism Parallel Congruent Rectangles Base Rectangular Prism Triangular Prism Triangles Rectangles

Notes = 34 in 2

Notes Triangles= 12 units 2 Rectangle = 20 units 2 Rectangle = 24 units 2 Base Face = 88 units 2.

Rotation: Group 1Group 2Group 3Group 4 1 st THAM 2 nd HMTA 3 rd MAHT 4 th ATMH

Exit Ticket: A cube-shaped box has edges that are 18 centimeters long. The box does not have a top. What is the surface are of the box? Justify your answer.