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# Circumference & Area Fluency Practice

Lesson 9 of 37

## Objective: SWBAT find the area and circumference of circles

*55 minutes*

#### Whiteboard Practice

*25 min*

The purpose of this lesson is to give students plenty of practice finding the circumference and area of circles. The mathematical practice that drives this lesson is **MP4 **as students apply the appropriate formulas to solve each problem.

I will have a whiteboard, marker, and eraser for every student. I like whiteboard practice when it is fast paced and I think most of the students do as well so I’ll keep a fairly short time limit for most of the problems. I’ll post a problem, set the time, and then ask for all boards up. I will make a quick scan around the room to make sure everyone has the answers. Again, I will have a list of students who either did not do well on previous day’s exit tickets or were perhaps absent on a previous day. It is hard to check everybody’s board so my focus will be here, though I will acknowledge other students. As I see them have success I know that the majority are most likely having success. The first set of problems will be simple. I’ll give a radius and ask for diameter or vice versa, or I’ll ask students to draw a circle with a given radius or diameter (not to scale). Students still make mistakes with these values so it is worth a few minutes. I will then go into PI questions. I will give a circumference and a radius or diameter and ask students to represent these values as the ratio PI. The next set of questions will be circumference problems followed by area problems.

I will use the resource below for many of the questions though I will probably not show the pages themselves.

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#### Accelerated Math Practice

*15 min*

I will create a short Accelerated Math assignment for each student consisting of two area problems and two circumference problems. I hope to have enough time here to scan student work so that they get immediate feedback. If time permits, they should make any necessary corrections in class, otherwise it will be part of homework.

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##### Similar Lessons

Environment: Urban

Environment: Suburban

###### Old and New Knowledge of Circles

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*Resources(13)*

Environment: Urban

- LESSON 1: Explore Perimeter and Area of Composite Shapes
- LESSON 2: Perimeter of Irregular Rectilinear Shapes
- LESSON 3: Area of Composite Shapes Using a Grid
- LESSON 4: Area of Composite Shapes
- LESSON 5: Area of Regions Formed by Inscribed Shapes
- LESSON 6: CORNERSTONE:Circle Ratios: Diameter to Radius; Circumference to Diameter
- LESSON 7: CORNERSTONE: Circumference Formula
- LESSON 8: Area of a Circle
- LESSON 9: Circumference & Area Fluency Practice
- LESSON 10: Finding the Radius From a Given Circumference or Area
- LESSON 11: Circumference from Area / Area from Circumference
- LESSON 12: Circle Designs: Finding the Area and Perimeter of Shapes Composed of Arcs and Line Segments
- LESSON 13: Assessment_Area and Perimeter (Circumference) of Composite Shapes and Circles
- LESSON 14: Drawing Prisms & Pyramids
- LESSON 15: Describe Prisms and Pyramids Using Algebra
- LESSON 16: Using Nets to Find the Surface Area of Prisms
- LESSON 17: Using a Formula to Find the Surface Area of Prisms
- LESSON 18: Finding the surface area of triangular prisms using a net
- LESSON 19: Finding the Surface Area of a Triangular Prism Using A Formula
- LESSON 20: Discovering the Formula for the Surface Area of A Cylinder
- LESSON 21: Finding the Surface Area of Cylinders Using a Formula
- LESSON 22: Practice Day: Surface Area of Prisms & Cylinders
- LESSON 23: Surface Area of Prisms and Cylinders Assessment
- LESSON 24: Finding the Surface Area of Pyramids Using Nets
- LESSON 25: Finding the Surface Area of Pyramids Using a Formula
- LESSON 26: Surface Area of Composite Shapes
- LESSON 27: Surface Area of Composite Shapes With Holes
- LESSON 28: Surface Area Assessment
- LESSON 29: 3-D Models from 2-D Views
- LESSON 30: Exploring Volume and Surface Area with Unifix Cubes
- LESSON 31: Explore Volume of Rectangular Prisms
- LESSON 32: Find the Volume of Prisms Using a Formula
- LESSON 33: Volume Of Cylinders Using a Formula
- LESSON 34: Volume of Composite Shapes
- LESSON 35: Volume and Surface Area - Accelerated Math Fluency Day
- LESSON 36: Volume of Pyramids
- LESSON 37: Surface Area and Volume Final Assessment