Flashcards

Thursday, April 17 Chapter 9 Review

Chapter 9 Review 1. The table below shows the areas of a triangle where the height of the triangle stays the same, but the base changes. Which expression can be used to find the area of a triangle that has a height of 4 units and a base of n units? A. 𝑛 4 B. 4𝑛 2 C. 4 2𝑛 D. 4n

Chapter 9 Review 1. The table below shows the areas of a triangle where the height of the triangle stays the same, but the base changes. Which expression can be used to find the area of a triangle that has a height of 4 units and a base of n units? A. 𝑛 4 B. 4𝑛 2 C. 4 2𝑛 D. 4n The area of a triangle is height times base divided by 2, or ℎ·𝑏 2 Answer: B

Chapter 9 Review 2. GRIDDED RESPONSE José used a square baking pan to make a cake. The length of each side of the pan was 16 inches. Find the area of the pan in square inches.

Chapter 9 Review 2. GRIDDED RESPONSE José used a square baking pan to make a cake. The length of each side of the pan was 16 inches. Find the area of the pan in square inches. A = l · w A = 16 in · 16 in A = 256 in²

Chapter 9 Review 3. Janet has a garden in the shape of parallelogram in her front yard. What is the area of the garden if it has a base of 10 feet of a height of 4 feet? F. 20 𝑓𝑡 2 G. 30 𝑓𝑡 2 H. 40 𝑓𝑡 2 I. 50 𝑓𝑡 2

Chapter 9 Review 3. Janet has a garden in the shape of parallelogram in her front yard. What is the area of the garden if it has a base of 10 feet of a height of 4 feet? F. 20 𝑓𝑡 2 G. 30 𝑓𝑡 2 H. 40 𝑓𝑡 2 I. 50 𝑓𝑡 2 A = l · w A = 10 ft · 4 ft A = 40 ft² Answer: H

Chapter 9 Review 4. In the spreadsheet below, a formula applied to the values in columns A and B results in the values in column C. What is the formula? A. C = A – B B. C = A – 2B C. C = A + B D. C = A + 2B

Chapter 9 Review 4. In the spreadsheet below, a formula applied to the values in columns A and B results in the values in column C. What is the formula? A. C = A – B B. C = A – 2B C. C = A + B D. C = A + 2B Answer: B

Chapter 9 Review 5. SHORT RESPONSE In Mrs. Tucker’s classroom library, there are 168 fiction and 224 nonfiction books. What is the ratio of fiction to nonfiction books in simplest form?

Chapter 9 Review 5. SHORT RESPONSE In Mrs. Tucker’s classroom library, there are 168 fiction and 224 nonfiction books. What is the ratio of fiction to nonfiction books in simplest form? 168 𝑓𝑖𝑐𝑡𝑖𝑜𝑛 224 𝑛𝑜𝑛𝑓𝑖𝑐𝑡𝑖𝑜𝑛 = 3 𝑓𝑖𝑐𝑡𝑖𝑜𝑛 4 𝑛𝑜𝑛𝑓𝑖𝑐𝑡𝑖𝑜𝑛 𝟑 𝟒

Chapter 9 Review 6. Which expression gives the area of a triangle with a base of 8 units and height 3 units? F. 8 × 3 G. 1 2 (8 × 3) H. 1 2 (8 + 3) I. (8 + 3) + (8 + 3)

Answer: G Chapter 9 Review 6. Which expression gives the area of a triangle with a base of 8 units and height 3 units? F. 8 × 3 G. 1 2 (8 × 3) H. 1 2 (8 + 3) I. (8 + 3) + (8 + 3) A = 𝑏 · ℎ ÷ 2, or A = b · h 2 𝐴= 8 𝑥 3 2 or 1 2 ( 8 x 3) Answer: G

Chapter 9 Review 7. Ted is making three picture frames like the one shown below. What length of wood does Ted need for all three picture frames? A. 11 1 2 in. B. 15 3 4 in. C. 27 1 4 in. D. 81 3 4 in.

Answer: D Chapter 9 Review 7. Ted is making three picture frames like the one shown below. What length of wood does Ted need for all three picture frames? A. 11 1 2 in. B. 15 3 4 in. C. 27 1 4 in. D. 81 3 4 in. P =2 𝑏+2ℎ P = 2· 5 3 4 + 2· 7 7 8 P = 27 1 4 Three frames: 81 3 4 in Answer: D

Chapter 9 Review 8. SHORT RESPONSE Lynette is painting a 15-foot by 10-foot rectangular wall that has a 9-foot by 5-foot rectangular window at its center. How many square feet of wall will she paint?

Chapter 9 Review 8. SHORT RESPONSE Lynette is painting a 15-foot by 10-foot rectangular wall that has a 9-foot by 5-foot rectangular window at its center. How many square feet of wall will she paint? A of wall =15· 10 = 150 ft² A of window = 9· 5 = 45 ft² Wall minus window 150 ft² - 45 ft² = 105 ft²

Chapter 9 Review 9. The cost of renting a car is shown in the advertisement. Which of the following equations can be used to find t, the cost in dollars of the rental for m miles? F. t = 0.10m + 25 G. t = 50 + 0.10 H. t = 50(m + 0.10) I. t = 50 + 0.10m

Chapter 9 Review 9. The cost of renting a car is shown in the advertisement. Which of the following equations can be used to find t, the cost in dollars of the rental for m miles? F. t = 0.10m + 25 G. t = 50 + 0.10 H. t = 50(m + 0.10) I. t = 50 + 0.10m t = $50 + $0.10 times the number of miles driven. Answer: I

Chapter 9 Review 10. The area of a triangle is 30 square inches. What is the length of the base if the height is 6 centimeters? A. 12 cm B. 10 cm C. 5 cm D. 3 cm

Chapter 9 Review 10. The area of a triangle is 30 square inches. What is the length of the base if the height is 6 centimeters? A. 12 cm B. 10 cm C. 5 cm D. 3 cm A = bh ÷ 2 30 = 6b÷ 2 30 · 2 = 6b ÷ 2 · 2 60 = 6b 60 6 = 6𝑏 6 10 = b Answer: B

Chapter 9 Review 11. GRIDDED RESPONSE The road sign shows the distances from the highway exit to certain businesses. What fraction of a mile is the restaurant from the exit?

Chapter 9 Review 11. GRIDDED RESPONSE The road sign shows the distances from the highway exit to certain businesses. What fraction of a mile is the restaurant from the exit? 0.65 = 65 100 = 13 20 Calculator .65, F D, =

Chapter 9 Review 12. For every $5 Marta earns mowing lawns, she puts $2 in her savings account. How much money will she have to earn in order to deposit $30 into her savings account? F. $6 G. $12 H. $15 I. $75

Chapter 9 Review 12. For every $5 Marta earns mowing lawns, she puts $2 in her savings account. How much money will she have to earn in order to deposit $30 into her savings account? F. $6 G. $12 H. $15 I. $75 For every $5, $2 goes into savings. She needs to mow 15 lawns ( $30 $2 ) to have $30 in savings. $5 x 15 lawns = $75 Answer: I

Chapter 9 Review 13. EXTENDED RESPONSE Ryan is painting a mural for his college art final. The mural is shaped like the figure shown below. Part A Find the perimeter of the figure. Part B Suppose Ryan doubles the side length of each side, what happens to the perimeter of the figure? Explain your reasoning.

Chapter 9 Review 13. EXTENDED RESPONSE Ryan is painting a mural for his college art final. The mural is shaped like the figure shown below. Part A Find the perimeter of the figure. P = 2b + 2 h P = 2· 6 + 2· 10 P = 32 ft²

Chapter 9 Review 13. EXTENDED RESPONSE Ryan is painting a mural for his college art final. The mural is shaped like the figure shown below. Part B Suppose Ryan doubles the side length of each side, what happens to the perimeter of the figure? Explain your reasoning.

Chapter 9 Review 13. EXTENDED RESPONSE Ryan is painting a mural for his college art final. The mural is shaped like the figure shown below. Part B Suppose Ryan doubles the side length of each side, what happens to the perimeter of the figure? Explain your reasoning. P₁ = 2b + 2 h P₁ = 2· 6 + 2· 10 P₂ =2· 12 + 2· 20 P₁ = 32 ft² P₂ = 64 ft² If you double the sides, you double the perimeter.

Chapter 9 Review Agenda Notes Homework– Homework Practice OAA – CH9a Due Monday, April 21 Final Exam- Friday, April 25 Blizzard Bag #3 – Show All Work