Find the radius or diameter of each circle with the given dimensions. 1. d = 6 cm 2. r = 11 ft Find the circumference of each circle. Use 3.14 for π. Round.

Slides:



Advertisements
Similar presentations
Area and Circumference of Circles
Advertisements

Circumferences and Areas of Circles COURSE 3 LESSON 8-8 The diameter of a small pizza is 24 cm. Find its area. Round to the nearest tenth. A = r 2 Use.
Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–3) CCSS Then/Now New Vocabulary Key Concept: Power Property of Equality Example 1:Real-World.
Warm-Up  Multiply.  1.89 x 97  x 76  x 34  4.38 x 28.
The area of the circle is about 227 m 2. COURSE 2 LESSON 8-4 Find the area of the circle to the nearest unit. = (8.5) 2 Substitute 8.5 for the radius.
Lesson 7-2 Circumference and Area of Circles. Definitions Circle - A set of points in a plane that are the same distance away from a given point in the.
Warm-Up Find the area: Circumference and Area Circles.
Course 2, Lesson 2-8 Find the sale price to the nearest cent. 1. $120 jacket; 30% discount 2. $10,500 car; 10% discount 3. $35 sweater; 18% discount; 3%
Course 2, Lesson The amount a cashier earns is shown in the table. Determine whether the amount earned is proportional to the number of hours worked.
Course 2, Lesson 1-1 Find the mean, median, and mode for each data set. Round to the nearest tenth if necessary. 1. number of cars in household: 1, 3,
Course 2, Lesson 1-2 Find each unit rate. Round to the nearest hundredth if necessary. 1. $3.99 for 16 ounces miles in 14 hours 3. $28 for 15 goldfish.
Course 2, Lesson 2-5 Use the determine reasonable answers strategy to solve Exercises 1–4. 1. If the speed limit is 65 miles per hour, what is a reasonable.
Write an integer for each situation. 1. stock market down 56 points
Course 2, Lesson 2-3 Estimate % of % of % of % of Twenty-two percent of the seventh-grade class at Santa Ana Middle.
1. $100 dinner; 20% gratuity 2. $12,300 car; 5% sales tax
Course 2, Lesson 2-6 Find each percent of change. Round to the nearest whole percent if necessary. State whether the percent of change is an increase or.
3. What is the constant of variation of the linear function. Pay $15
Course 2, Lesson 1-3 Simplify On her last science test, Maria answered of the questions incorrectly. Write as a fraction in simplest form.
Solve each inequality. Graph the solution set on a number line.
Course 2, Lesson 4-2 Write each fraction or mixed number as a decimal. Use bar notation if the decimal is a repeating decimal Write each decimal.
the right? Round to the nearest tenth.
Course 2, Lesson 1-5 Use the four-step plan to solve each problem. 1. A comic book store took in $2,700 in sales of first editions during November. December.
Course 2, Lesson 7-5 Find the length of each object on a scale drawing with the given scale. Then find the scale factor. 1. a subway car 34 feet long;
Find the volume of each pyramid. Round to the nearest tenth.
Find the area of each circle. Round to the nearest tenth. Use 3
Use the solve a simpler problem strategy to solve Exercises 1–3. 1. Mr. Cole decided to build a deck around his swimming pool. His pool is 25 feet by 10.
A ten-sided number cube with the numbers 1–10 on it is rolled. Find the probability of each event. Write each answer as a fraction. 1. P(3) 2. P(1 or 2)
Course 2, Lesson 7-6 Draw a top, a side, and a front view of the solid. 1. Draw the solid using the top, side, and front views shown. Use isometric dot.
1. choosing north, south, east, or west and one of the 50 states
HOW are percent diagrams used to solve real-world problems?
Solve by using a graph. 1. A carpet cleaner charges $25 per room cleaned. Predict the cost of having 5 rooms cleaned. 2. The table shows the number of.
Identify each solid. Name the number and shapes of the faces. Then name the number of edges and vertices Course 2, Lesson 8-1.
1. Construct a double box plot for the data in the table. Then compare the heights of the LA Lakers to the heights of the NY Knicks. 2. Candice used a.
HOW is compound interest different from simple interest? Ratios and Proportional Relationships Course 2, Inquiry Lab after Lesson 2-8.
5. Thirteen percent of the profits from Kendall’s business are
Find the surface area of each rectangular prism. Round to the nearest tenth if necessary Find the surface area of a rectangular prism that has.
Determine whether the conclusion is valid. Justify your answer. 1. To decide what main dish to serve at her wedding, Jeanne asks 50 of her friends and.
1. Akira earns $20 for every dog he washes. 2.
Find the surface area of each pyramid. Round to the nearest tenth.
Expressions and Equations
Solve. 1. A survey of high school students showed that 63% of students planned to take college courses after graduation. Predict how many of the 837 students.
Solve each inequality. Check your solution. 1. –3x ≥ k > 300 Solve each inequality. Graph the solution set on a number line. 4. 4p + 3 ≤ –1 5.
HOW is percent used to solve real-world problems? Ratios and Proportional Relationships Course 2, Inquiry Lab before Lesson 2-3.
Course 2, Lesson 7-4 Use the make a model strategy to solve Exercises 1 and 2. A 15-inch by 20-inch piece of poster board has a 3.5-inch square cut out.
Course 2, Lesson 2-2 Find each number. Round to the nearest tenth if necessary % of % of % of % of $ % of
Splash Screen. Lesson Menu Five-Minute Check (over Lesson 10–2) Main Idea and Vocabulary Key Concept: Area of a Parallelogram Example 1:Find Areas of.
Opening Activity 1. Find the circumference of a circle with a diameter of 8 ft. Round to the nearest tenth. C= 3.14(8)= 25.1 ft 2. Find the circumference.
Course 2, Lesson 1-7 Solve each proportion Solve. Assume all situations are proportional. 3. For every 4 students, 3 like peanut butter and jelly.
Solve each inequality. Graph the solution set on a number line. 1. 3a + 3 < y + 2 > –22 3. –5m – 5 ≤ Ann has only $10 to spend on carnival.
Use with Lesson X Standard X.XX.X Common Core State Standards © Copyright National Governors Association Center for Best Practices and Council of.
1. How many permutations are possible of the letters in the word secret? 2. Julie, Dan, Janet, Kevin, and Michael all enter a contest. Two names are pulled.
Use with Lesson X Standard X.XX.X Common Core State Standards © Copyright National Governors Association Center for Best Practices and Council of.
Compare and order integers Find the absolute value of an expression Lesson 2-1 Rational Numbers and Exponents.
Evaluate each expression if a = 3, b = 7, and c =
How can you use numbers and symbols to represent mathematical ideas?
Use the guess, check, and revise strategy to solve each exercise.
Write each decimal as a fraction or mixed number in simplest form.
5 Rational Numbers: Positive and Negative Decimals.
Find the value of x in each triangle
Use the four-step plan to solve each problem.
Lesson 1.3 Variables and Expressions (Glencoe book)
Evaluate each expression. Round to the nearest tenth if necessary.
DO NOW Complete number 6 (Area and Perimeter) on sheet 6-8.
Bellwork: 2/12/18 (Block 3) Use the look for a pattern strategy to solve Exercises 1–3. 1. In a stadium, there are 10 seats in the 1st row, 13 seats in.
2. Jack practiced dribbling a soccer ball for of his total
Estimate each product. Use a bar diagram if needed
Multiply. Write in simplest form
Multiply. Write in simplest form
Solve each inequality. Graph the solution set on a number line.
Fluency- Integers Course X, Lesson X-X.
Presentation transcript:

Find the radius or diameter of each circle with the given dimensions. 1. d = 6 cm 2. r = 11 ft Find the circumference of each circle. Use 3.14 for π. Round to the nearest tenth if necessary Charlotte has a trampoline in her backyard. The diameter of the trampoline is 14 feet. What method can Charlotte use to find the circumference of the trampoline? Course 2, Lesson 8-2

ANSWERS 1. r = 3 cm 2. d = 22 ft cm in. 5. Multiply the diameter by π.

Geometry Course 2, Lesson 8-2 HOW do measurements help you describe real-world objects?

Course 2, Lesson 8-2 Common Core State Standards © Copyright National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved. Geometry 7.G.4 Know the formulas for the area and circumference of a circle and use them to solve problems; give an informal derivation of the relationship between the circumference and area of a circle. Mathematical Practices 1Make sense of problems and persevere in solving them. 3Construct viable arguments and critique the reasoning of others. 4Model with mathematics.

To find the area of a circle To find the area of a semicircle Course 2, Lesson 8-2 Geometry

Course 2, Lesson 8-2 Geometry semicircle

Course 2, Lesson 8-2 Geometry WordsThe area A of a circle equals Model the product of and the square of its radius r. SymbolsA =

How did what you learned today help you answer the Course 2, Lesson 8-2 Geometry HOW do measurements help you describe real-world objects?

How did what you learned today help you answer the Course 2, Lesson 8-2 Geometry HOW do measurements help you describe real-world objects? Sample answers: To find the area of a circular object, such as the area of a radio signal To find the area of a semicircular object, such as window

Suppose you have a circular rug in your living room. Describe how you would find the area of the rug and which measures you would need to know in order to find its area. Course 2, Lesson 8-2 Ratios and Proportional RelationshipsFunctionsGeometry