Henrico County Public Schools
Technology Integration Lesson Plan
Lesson Title: Area and Circumference of a Circle
[NOT using the Problem Based Learning model]
Teacher: Mr. Anderson School: Hermitage High School
Grade Level: 9-12
List specific content and technology SOLs which will be taught during this lesson:
Content Strand: Polygons and Circles SOL#: Geometry G.10
Lesson Overview:
Students will review the formulas for area and circumference of a circle and apply them in determining the area of a sector and arc length of a circle.
Objectives and Goals:
1. The student will use the formulas for area, circumference, sector and arc length to solve problems.
Approximate Time Required to Complete the Lesson: 90 minutes
Tools Needed:
· 1-to-1 laptop
· Internet Access
· Software: The Geometer’s Sketchpad, Calculator, Windows Media Player
Tasks/Activities:
Day 1:
- Warm-Up: Given the formulas: , the student will solve for C (circumference) and A (area) for the following values of r: 2, 3, 4, 5
- The teacher reviews the warm-up activity.
The following uses the IGO web page (HCPS Geometry Web resources): http://teachers.henrico.k12.va.us/math/igo/08Circles/8_2.html
- The teacher presents the lesson using the Powerpoint and Sketchpad File.
- Guided Practice: Students use the “Classwork” file for in class practice.
- The teacher reviews the classwork problems.
- Students do the “Self Check” quiz
- The teacher reviews the “Self Check” quiz
- Assignment: Students do all problems from the “Homework” file. If needed, the student may view the video tutorial for this lesson: http://teachers.henrico.k12.va.us/hermitage/anderson_p/VideoLecture/WMVideos/Lesson8-2.wmv
Day 2:
- Warm-Up: The teacher puts similar problems to the quiz on the board. The teacher checks the homework assignment with limited individual assistance.
- The teacher reviews the Warm-Up problems.
- The teacher reviews the homework assignment.
- Assessment is administered.
Assessment:
· Traditional paper assessment
· 5 questions
· Each question: 10 points for an appropriate formula, 10 points for a correct answer.
1. Find the area of a circle with a radius of 10.
answer ______
2. Find the area of the sector of a circle with a radius of 10 and an arc angle of 100°.
answer ______
3. Find the circumference of a circle with a radius of 15.
answer ______
4. Find the length of an arc with a radius of 15 and an arc angle of 100°.
answer ______
5. A circular garden is divided into 6 equal sectors. If the radius of the garden is 10 feet, then find the area of one of the sectors.
answer ______
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