Grade 8: Math Course 3 TEACHER VERSIONCh 10-1BCircumference and Area of CirclesPrerequisite Content:Use formulas to find surface areas and volume of three dimensional shapes,including composite shapes.Learning Goal:By the end of this lesson, students will be able to find the circumference andarea of circles.More Complex Content:Solve multi-step equations and problems to find perimeter and area for two-dimensional figures.Score 4.0 In addition to Score 3.0 performance, in-depth inferences and applications that go beyond what was taught, such as The student can, without help, correctly solve a real-world word problem requiring the computation of the area or circumference of a circle. The student can find the area or circumference of a complex shape involving a circle(s) and other two-dimensional figure(s) (for example, a shaded region). Score 3.5 The student can, without help, correctly solve for the radius or diameter of a circle given the perimeter or area of the circle.Score 3.0 While engaged in area and perimeter of a circle tasks, the student demonstrates an ability to Correctly, without help, solve for the area and circumference of a circle. The student exhibits no major errors or omissions. Score 2.5 The student can, without help, correctly estimate the area and/or circumference of a circle.Score 2.0 No major errors or omissions regarding the simpler details and processes, such as with help, the student can find the circumference of a circle and/or the area of a circle using the correct formula. However, the student exhibits major errors or omissions with Score 3.0 elements. Score 1.5 The student understands that π (pi) is a little more than than three (3).
Score 1.0 With help, a partial understanding of some of the Score 2.0 elements and some of the Score 3.0 elements. The student knows that the circumference of a circle is a little more than 3 times the diameter of a circle. The student knows that the area of a circle is a little more than three times the radius squared of a circle. Score 0.5 The student can identify a circle, chord, radius, diameter, and center of a circle. The student knows the value of π (pi) is or rounded to the hundredths place, 3.14.Score 0.0 Even with help, no understanding or skill demonstrated.