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Exterior and Interior Angles of Triangles

For Teachers 10th
Tenth graders explore the exterior and interior angles of triangles. They use a theorem in order to prove a theorem about all polygons. Students use the theorem and its applications to find the angles of different types of triangles.
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How To Find the Area of a Square And Rectangle

For Teachers 4th - 6th
Students practice using the formula to calculate the area of a square or triangle. They participate in large group guided practice using simple area of squares problems then complete a series of problems calculating the area of rectangles.
Worksheet
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Area: Rectangles

For Students 3rd - 5th
In this finding area practice worksheet, students examine 6 rectangles and their measurements in order to calculate the area of each of them.
Worksheet
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Area

For Students 7th - 8th
In this area worksheet, students solve and complete 20 different problems that include the measurement of various figures. First, they determine the area of each of the triangles, parallelograms and trapezoids. Then, students determine...
Worksheet
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Area and Perimeter

For Students 10th
In this area and perimeter learning exercise, 10th graders solve and complete 18 various types of geometry problems. First, they find the area of a figure shown with consecutive sides perpendicular. Then, students find the area and...
Worksheet
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Right Triangles

For Students 10th
In this right triangles worksheet, 10th graders solve and complete 5 various types of problems. First, they solve each of the triangles shown and find the area of each triangle. Then, students find the perimeter and area of the regular...
Worksheet
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Guided Notes on Area

For Students 9th - 10th
In this area worksheet, learners find the area of rectangles, triangles and circles. This eight-page worksheet contains approximately 36 problems. Examples and explanations are provided. Answers are included at the end of the worksheet.
Worksheet
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Chapter 7 Final Review Extra Problems: Triangles

For Students 9th - 12th
For this triangles worksheet, students respond to 4 short answer problems. Students describe side relationships of different types of triangles. Students find the area of a segment formed by a sector.
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Areas by Dissection

For Students 8th - 10th
For this areas by dissection worksheet, students find the area of given composite figures. This three-page worksheet contains examples, explanations, and 16 problems. Answers are provided on page three.
Lesson Plan
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I. M. Pei and the Geometry of the NGA

For Teachers 5th - 8th
Students compare design elements in neoclassical and modern architecture. They review knowledge of triangles and quadrilaterals and design a geometric pattern using Pei's polygons They create a city plan using a variety of lines and...
Lesson Plan
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Complex Area Problems

For Teachers 9th - 11th
Learners calculate the area of different polygons. In this geometry lesson, students find the area of complex polygons. They solve word problems using rates and distances.
Worksheet
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Finding Perimeter and Area

For Students 5th - 8th
In this area and perimeter worksheet, students are given the equations to find the perimeter and area of objects. They practice finding the perimeter by measuring the sides of given objects and adding them together. They find the area of...
Lesson Plan
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Fish Tanks: Volume and Surface Area

For Teachers 5th - 7th
Given a very realistic challenge, your young geometers design residential fish tanks in rectangular and triangular prism shapes. They compute the volume of water each will hold. They also determine the size of plastic covers for each...
Lesson Plan
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A Practical Application For Area

For Teachers 1st
First graders investigate the concept of surface area and find the coverage for the surfaces in a building that includes carpet or walls. The application of finding the area is practical using the everyday objects to help them to make...
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Perimeter and Area of Triangles [C]

For Students 5th - 6th
In this triangle worksheet, students find the perimeter and area for a set of 4 triangles. Answers and a link to additional worksheets are included.
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Perimeter and Area of Triangles [D]

For Students 5th - 6th
In this triangle worksheet, students find the perimeter and area for a set of 4 triangles. Answers and a link to additional worksheets are included.
Worksheet
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Perimeter and Area of Triangles [E]

For Students 5th - 6th
In this triangle instructional activity, students find the perimeter and area for a set of 4 triangles. Answers and a link to additional worksheets are included.
Lesson Plan
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Exploring Areas of Irregular Polygons

For Teachers 9th - 12th Standards
Students solve for the area of different polygons. In this geometry lesson, students identify and differentiate between regular and irregular polygons. They use properties of irregular polygons to solve problems.
Worksheet
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Finding Area of Triangles

For Students 5th - 6th
In this area of triangles activity, students calculate the area of 4 given triangles, writing total area beneath each. A reference web site is given for additional activities. 
Worksheet
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Area of Triangles

For Students 4th - 6th
In this area of triangles learning exercise, learners calculate area for a set of 4 triangles, writing total area beneath each. A reference web site is given for additional activities.
Worksheet
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Area of Triangles

For Students 5th - 6th
In this area of triangles instructional activity, students calculate the area of 4 given triangles, writing the answers in rectangles beneath each. A reference web site is given for additional activities.
Lesson Plan
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Special Right Triangles

For Teachers 9th - 12th Standards
Using the Pythagorean Theorem to solve for missing angles, students evaluate right triangles and their properties.
Lesson Plan
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Pythagorean Theorem

For Teachers 6th - 7th
In this pythagorean theorem worksheet, students identify the missing length of one side for 10 triangles. Each triangle gives the lengths of two sides and students must find the length of the third. 
Worksheet
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Effects of Changing Dimensions Proportionally

For Students 9th - 10th
In this geometry worksheet, students describe the effect of a proportional change on the perimeter or circumference and area of the given circles or quadrilaterals.  The one page worksheet contains ten problems.  Answers are...

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