Geometry Chapter 6 Assignment Sheet
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1 Geometry Chapter 6 Assignment Sheet Section/Assignment Due Date Turned in? Section 6.1 HW: 6.1 Worksheet Section 6.2 HW: 6.2 Worksheet Section 6.3 HW: 6.3 Worksheet Section 6.4 HW: 6.4 Worksheet Section 6.5 HW: 6.5 Worksheet Section 6.6 HW: 6.6 Worksheet Chapter 6 Review The Chapter 6 Test is on. **If all seven assignments are completed by the day the chapter 6 test is given you will receive 5 extra points on the test. **
2 Ratio and Proportion Notes 6.1 Ratio of a to b. EX 1: Converting Units. A) 12 cm 4 m B) 3 yd. 6 ft. EX 2: Writing Ratios. A) Find the width to length ratio of each rectangle. Then simplify the ratio. 4 cm EX 3: Using Ratios. 20 cm A) The perimeter of rectangle ABCD is 60 cm. The ratio of AB:BC is 3:2. Find the length and width of the rectangle. B w C l A D B) The perimeter of the isosceles triangle shown is 56 in. The ratio of LM:MN is 5:4. Find the lengths of the sides and the base of the triangle. L N M EX 4: Extended Ratios (Comparing more than two items) A) The measure of the angles in JKL are in the extended ratio of 1:2:3. Find the measures of the angles. (Draw a sketch) B) The measures of the angles in a triangle are in the extended ratio 3:4:8. Find the measures of the angles. (draw a sketch)
3 Difference between ratio and proportion. RATIO PROPORTION If a. m b, which of the following is not true? a r a r m b b. mb = ar c. mr = ab d. r b a m EX 5: Solving Proportions. (Cross Multiplying) A) Solve: x B) Solve: x 6 x 4 10 (DISTRIBUTE!!!) EX 6: Using Proportions. A) AB : BC 2:5. Solve for x. B) 2m + 4 Geometric Mean EX 7: Find the geometric mean of the following numbers. a) 5,8 b)12,24 c)5,100
4 Problem Solving in Geometry with Proportions NOTES 6.2 Objective: Use properties of proportions. If a c b d, then a b c d If a c a +b b, then d b c +d d EX 1: In the diagram AB AC. EX 2: In the diagram MQ LQ. BD CE MN LP Find the length of BD. Find the length of LQ. EX 3: EX 4: EX 5: International standard paper sizes are commonly used all over the world. The various sizes all have the same width-to-length ratios. Two sizes of paper are shown, called A4 and A3. Find the value of x. EX 6: A scale model of the Titanic is inches long and inches wide. The Titanic itself was feet long. How wide was it? EX 7: You are building a scale model of your uncle s fishing boat. The boat is 62 ft long and 23 ft wide. The model will be 14 inches long. How wide should it be?
5 Similar Polygons Notes 6.3 Similar Polygons Corresponding angles are: Corresponding sides are: EX 1: Using Similarity Statements. These 2 quadrilaterals are similar Write Similarity Statements: A) Pentagon JKLMN and STUVW are similar. Draw a sketch (JKLMN is larger) List all the pairs of congruent angles. Write the ratios of the corresponding sides in a statement of proportionality. B) ABCD PQRS ~. Draw a sketch (ABCD is larger) List all pairs of congruent angles. Write the statement of proportionality.
6 EX 2: Comparing Similar Polygons. Decide if the figures are similar. (are all pairs of angles congruent? Are all pairs of sides proportional?) If the figures ARE similar, write a similarity statement. A) B) EX 3: Comparing Photographic Enlargements A) You have been asked to create a poster to advertise a field trip to see the Liberty Bell. You have a 3.5 in. by 5 in. photo that you want to enlarge. You want the enlargement to be 16 in. wide. How long will it be? B) You have a photo 4 in. wide by 6 in. long that you want to reduce to fit in a frame that is 1.5 in. wide. How long will the reduced photo be? Scale Factor Perimeters of Similar Polygons EX 4: Using Similar Polygons ABCD ~ GHIJ. A) a. Find the scale factor of ABCD to GHIJ. b. Find the scale factor of GHIJ to ABCD. c. Find the values of x and y. d. Find the ratio of the perimeter of ABCD to the perimeter of GHIJ.
7 Similar Triangles Notes 6.4 Objective: Identify similar triangles. AA SIMILARITY POSTULATE EX 1: In the diagram, BTW ETC. Write a statement of proportionality. Find the m TEC. Find ET and BE. EX 2: Determine if the triangles are similar. If they can, write a similarity statement. If not, explain why. A. B. C. D.
8 EX 3: Find the length of the altitude MS. EX 4: JNL RTS. Find the length of KN. EX 5: The triangles are similar. Find the value of the variable. A. B. EX 6: You are standing 15 m from building A and 50 m from building B. Building A is 90 m tall. Find the height of building B. B A
9 Proving Triangles are Similar Notes 6.5 Side-Side-Side Similarity Theorem (SSS) Side-Angle-Side Similarity Theorem (SAS) EX 1: Determining Similarity. A) Determine which two of the three triangles are similar. Find the scale factor for the pair. B) By what method are the triangles similar?
10 EX 2: Logical Reasoning. Draw a sketch of the description. Name the theorem that can be used to prove the triangles similar. A) In ABC, AC=5, BC 20, and m C 80. In DEF, DF 3, EF 12, and m F 80. Draw sketch: EX 3: Use the diagram to complete the statements. a) AEB ~ b) m DEC c) is AED ~ BEC? d) EC= EX 4: Using Similar Triangles. A) Find the height of the tree.
11 Proportions and Similar Triangles Notes 6.6 Objective: The learner will use proportionality theorems to calculate segment length. THEOREM 8.4 Triangle Proportionality Converse of 8.4 THEOREM 8.6 THEOREM 8.7 EX 1: Find the length of EC. EX 2: Find the length of YX. EX 3: Determine whether MN GH. EX 4: Determine whether PQ TR.
12 EX 5: What is the length of TU? EX 6: What is x? EX 7: Find the length of DC. EX 8: Find the length of MN. EX 9: Find the value of the x. EX 10: Find the value of the variables.
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