Today in class students learned how to create scaled copies of given shapes.
Answers to HW: 1. When you get into class, check your drawings with your table partner. 2. The scale factor is 1/3. The side lengths of quadrilateral B must be 2,3,3, and 4. The perimeter is 2+3+3+4 = 12 3. Since the perimeter of the original polygon is 10, to achieve a perimeter of 30 the scale factor must be 3. Check your drawing with your table partner in class. 4. Ha, trick question. Actually only D is a scaled copy of A.
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Today in class students learned about scale factors, and how to tell if shapes that have corresponding parts are actually scaled copies.
Answers to HW: 1a. We can share the pair of corresponding points and pairs of lines we chose with our groups at the beginning of class tomorrow. b. Scale factor is how much the original is multiplied by to create the scaled copy. If you multiply the original by 1/4 or 0.25, you get the scaled copy. Count the square units and prove the math for yourself. 2. Statements B, D, and E MUST be true. 3. a. the scale factor is 2 because the top of A(2.5) corresponds to the top of B (5). b. Using a scale factor of 2 means you multiply each corresponding side on figure A to find out the sides of B...on the left side it measures 3, and on the right side is 5 c. The corresponding angles are also 53 degrees and 82 degrees because the figures are scaled copies of each other. 4. a. 5 b. 32 c. 3 d. 14 e. 1/3 Today in class students began learning about scale copies of shapes or pictures. We know that we can see if pictures are scale copies of each other by looking at the angles and shape. We know that shapes are scale copies of each other if they are multiplied ON EACH PART of the shape by the same number.
Answers to HW: 1. Figures 2 and 4 are scaled copies. Notice the same angle shapes, AND if you can draw a square around the letter like the original. Figure 1 fits inside a rectangle not a square, and figure 3 has different angles than the original. 2. Nope, sorry Tyler, but both the height AND the width have to be 1/2 the size of the original in order for it to be a scale copy. 3. Both A and D are scaled copies. B is flattened horizontally, and B is stretched vertically. Today in class students learned about their growth potential as students and people. We have our new math workbook for unit 1 and it should already have our name on it :)
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October 2018
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