Lesson Plan
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Geometry of Circles: Week 7

For Teachers 10th - Higher Ed
In this circle worksheet, students determine the number of degrees in a minor arc, find the area of a circle, find the area of a shaded region. This two-page worksheet contains six problems.
Lesson Plan
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Geometry of Circles - Week 7 (Area & Circumference)

For Teachers 12th - Higher Ed
In this circle worksheet, learners solve problems involving the circumference, area and arc length in a circle. They explore the union of circles and semicircles, as well as the line segments tangent to the circle. This two-page...
Lesson Plan
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Circles and Pi

For Teachers 9th - 11th
Students identify the relationship between the radius and Pi. In this geometry lesson plan, students calculate the circumference and area of a circle. They create visuals to help them see how the circumference relates to Pi.
Lesson Plan
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Graphing Parabolas and Circles

For Teachers 9th - 11th
Students graph parabolas and circles. In this algebra lesson, students create a table of values and graph the coordinate pairs to create a graph. They graph a circle using the radius and center.
Interactive
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Circles

For Students 10th
In this geometry activity, 10th graders determine the circumference and area of a circle given either the diameter or the radius. The one page interactive activity contains ten questions. Answers and hints are included. 
Lesson Plan
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Unit Circle and Triangle

For Teachers 9th - 11th
Students apply the Unit Circle to solve ratios of triangles. For this geometry lesson, students derive the different ratios of a triangle using the Pythagorean Theorem. They find the angles of a unit circle using a right triangle.
Worksheet
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Formulas Homework

For Students 9th - 12th
In this circle formulas worksheet, students solve 20 fill in the blank problems. Students find the radius, diameter, circumference, area, arc length, and sector area of a circle.
Lesson Plan
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Don't Be a Square

For Teachers 4th - 6th
Students analyze the relationship between radius and diameter.  Students read Sir Cumference and the First Round Table then take measurements of circular items from around the room.  Students compute the radius, diameter...
Worksheet
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Circles

For Students 9th - 10th
For this geometry worksheet, students solve problems by finding the diameter, radius and chord of a circle. They also solve for the area of the circle. There are 10 questions with an answer key.
Worksheet
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Chapter 8 Worksheet 3 Circumference & Area

For Students 8th - 12th
For this circumference and area worksheet, learners determine the circumference and area of given circles. They find the area of shaded regions of circles and areas around circles. This two-page worksheet contains 18 multi-step problems.
Lesson Plan
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Length of an Arc and Area of a Sector

For Teachers 10th
In this length of an arc and area of a sector worksheet, 10th graders solve and complete 12 different types of problems. First, they find the length of an arc in a circle with a given radius and central angle measure. Then, students find...
Worksheet
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Tangent Lines

For Students 10th
In this tangent lines instructional activity, 10th graders solve and complete 13 various types of problems. First, they solve the right triangles for the variables shown. Then, students name a radius, a diameter, a tangent, a secant, a...
Lesson Plan
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Electric Hoist Problem

For Teachers 6th - 8th
Middle schoolers convert angle measures between degrees and radians. They are given a copy of the task sheet with a graphic to help describe the situation. Pupils review the angle and arc relationship in a circle related to length of...
Worksheet
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Volume and Surface Area

For Students 10th
In this volume and surface area instructional activity, 10th graders solve and complete 12 different types of problems. First, they find the volume and total surface area of a given circle. Then, students find the height and radius of a...
Worksheet
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Volume Word Problems

For Students 10th
In this volume worksheet, 10th graders solve 10 different word problems that include determining the volume in each one. First, they determine the ratio of their radius given the cubic meters of a sphere. Then, students determine the...
Lesson Plan
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The Solar System

For Teachers 9th - 12th
Students construct a sketch of the planets in our solar system using concentric circles and angles. In this solar system lesson plan, students plot the position of each planet on concentric circles using graph paper. The sun is included...
Worksheet
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Tangents Multiple Choice

For Students 9th - 12th
In this circles worksheet, high schoolers solve 10 multiple choice problems. Students use a diagram of a circle with tangent lines and segment bisectors to answer each question. High schoolers find unknown segment lengths using the given...
Worksheet
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What do Atoms Look Like?

For Students 9th - 12th
In this atoms instructional activity, high schoolers complete 58 questions about the atomic radius of atoms, the ionization energy, the valence electrons, metals, non-metals and semi-metals and the families of elements.
Worksheet
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What do Atoms Look Like?

For Students 9th - 12th
In this atom worksheet, students complete 60 questions about the trends in atoms such as ionization energy and atomic radius, about valence electrons, about the families of elements, about metals, non-metals and semi-metals, about the...
Lesson Plan
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3.14159265

For Teachers 9th - 12th
Students discover the value of Pi.  In this value of Pi lesson, students measure the circumference and diameter of various circles on their graphing calculator.  Students find the ratio of the circumference to the diameter and...
Worksheet
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Measuring the Speed of a Solar Tsunami!

For Students 9th - 11th
In this solar tsunami worksheet, students are given three images of the progress of a Morton Wave on the sun. They solve six problems using the images to find the radius of the sun's disk, the scale of the image, and the time that passed...
Worksheet
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Volume and Surface Area

For Students 10th
In this volume and surface area learning exercise, 10th graders solve and complete 10 different problems that include using spheres to examine changes in volume and surface area. First, they complete the chart shown using the formulas...
Worksheet
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Spheres Homework

For Students 8th - 10th
In this spheres worksheet, students determine the volume and area of spheres when given the diameter or radius.  This one-page worksheet contains 10 multi-step problems.
Interactive
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Online Math Learning: Surface Area of Spheres

For Students 9th - 12th
In this surface area of spheres worksheet, students solve 4 short answer problems. Students find the surface area of spheres, hemispheres, and cones given a radius or a radius and height.

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