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Do Now 3/2/10

Do Now 3/2/10. Take out HW from last night. Text p. 299, #1 & 2 Copy HW in your planner. Text p. 302, #12-40 multiples of 4, #41 & #43 Measurements of your bedroom (length & width) and at least 4 objects (bed, dresser, desk, etc…) Read page 299 in the textbook “Making a Scale Drawing.”.

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Do Now 3/2/10

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  1. Do Now 3/2/10 • Take out HW from last night. • Text p. 299, #1 & 2 • Copy HW in your planner. • Text p. 302, #12-40 multiples of 4, #41 & #43 • Measurements of your bedroom (length & width) and at least 4 objects (bed, dresser, desk, etc…) • Read page 299 in the textbook “Making a Scale Drawing.”

  2. Concept Activity“Making a Scale Drawing” • Read page 299 in the textbook “Making a Scale Drawing.” • Complete the ‘Draw Conclusions’ questions #1 & #2.

  3. Concept Activity“Making a Scale Drawing” • 1) • sofa: 0.6 cm, 0.3 cm • table: 0.4 cm, 0.3 cm • piano: 0.5 cm, 0.2 cm • 2)

  4. Objective • SWBAT make a scale drawing of an object

  5. Section 6.6 “Scale Drawings” SCALE DRAWING- A two-dimensional drawing that is similar to the object it represents. SCALE MODEL- A three-dimensional model that is similar to the object it represents.

  6. 1 centimeters = 85 kilometers 1 d = 85 4.2 4.2 d SCALE - the SCALE of a drawing, map, or model relates the dimensions of the drawing, map, or model to the actual dimensions. Write and solve a proportion to find the distance dbetween Cleveland and Cincinnati if the distance on the map is about 4.2 centimeters. Cross products property d = 357 Simplify.

  7. A dinosaur model kits sold at a hobby store has a scale of 1 ft : 25 ft. A completed model of the dinosaur is 1.6 feet long. Estimate the actual length of the dinosaur. 1 = 25 1.6 The actual length of the dinosaur is about 40 feet. g SOLUTION Write and solve a proportion to find the length gof the dinosaur. 1 ∙g = 25 ∙ 1.6 Cross products property g = 40 Simplify.

  8. A model of a space shuttle has a scale of 1 : 52. The space shuttle has a wingspan of 78 feet. Find the model’s wingspan. 1 = 52 w The wingspan of the model is 1.5 feet. 78 SOLUTION Write and solve a proportion to find the wingspan wof the space shuttle. 1 ∙ 78= 52 ∙ w Cross products property Simplify. 1.5= w

  9. A scale drawing of a basketball court has a scale of 1 inch : 9 feet. • The basketball court is 94 ft by 50 ft. Find the dimensions of the court in the scale drawing. 1 ∙ 94= 9 · L L = 10 4/9in 1 ∙ 50= 9 ∙ W W = 5 5/9in

  10. A scale drawing of a basketball court has a scale of 1 inch : 9 feet. The free throw line is 15 feet from the backboard. How far is it in the scale drawing? 1 ∙ 15= 9 · b b = 1 2/3in

  11. SCALE - the SCALE of a drawing, map, or model relates the dimensions of the drawing, map, or model to the actual dimensions. Writing Scales without Units 1 in : 20 ft 1 cm : 5 m

  12. Homework NJASK7 Prep • Text p. 302, #12-40 multiples of 4, #41 & #43

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