Worksheet
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Using Centimeters to Measure the Perimeter of Triangles

For Students 2nd
In this using centimeters to measure the perimeter of triangles worksheet, 2nd graders measure 6 triangles with a centimeter ruler and write the equation used to find the perimeter.
Worksheet
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Mid-Segment of a Triangle

For Students 10th - 11th
In this triangle worksheet, students examine triangle diagrams. They determine the perimeter, length of a line, midpoint of a line, and angle measurement from given information. This one-page worksheet contains ten problems.
Lesson Plan
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The Greedy Triangle

For Teachers 3rd
Third graders use the book "The Greedy Triangle" to practice measuring perimeter and area. They also calculate the length of objects.
Lesson Plan
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Geography: Lengths, Perimeter, and Area of Similar Objects

For Teachers 6th
Sixth graders explore characteristics of similar objects. Using attribute blocks, they explore the ratios of the perimeter, area and side length in similar shapes. They calculate and compare the area of shapes.
Lesson Plan
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Area of Rectangles and Triangles

For Teachers 8th
Eighth graders practice calculating the perimeter of different shapes. As a class, they work together to calculate the area of rectangles and triangles using the proper formula. To end the lesson, they determine how many feet are in a...
Worksheet
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Special Right Triangles

For Students 10th
In this special right triangles worksheet, 10th graders solve 7 various problems with various types of right triangles. First, they identify the two special types of right triangles, the 45-45-90 degree triangle and the 30-60-90 right...
Worksheet
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Triangles

For Students 10th
In this triangles worksheet, 10th graders solve and complete 2 different problems. First, they find the perimeter of each triangle as described. Then, students find the slope of each side and altitude to each side of the triangles. In...
Worksheet
Curated OER

Triangle worksheets

For Students 10th
In this geometry worksheet, 10th graders explore triangle properties, including the sum of the measures of the angles of a triangle, the triangle inequalities, properties of isosceles triangles, properties of congruent triangles, and...
Worksheet
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Right Triangles

For Students 10th
In this right triangles worksheet, 10th graders solve and complete 12 different types of problems. First, they solve for a variable given each of the right triangles with the sides as indicated. Then, students determine the shorter...
Lesson Plan
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Length, Perimeter, and Area

For Teachers 2nd - 6th
Students explore the concepts of length, perimeter and area. Students develop an understanding of length, perimeter, and area. Students calculate the area and perimeter of random shapes and calculate the area and perimeter of a triangle...
Lesson Plan
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Area, Perimeter, Circumference

For Teachers 6th
Sixth graders use different measuring tools to measure area, perimeter, and circumference of different shapes. In this measurement lesson plan, 6th graders measure parallelograms, triangles, and circles.
Lesson Plan
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Discovering Perimeter

For Teachers 12th
Twelfth graders apply perimeter measurement to items found in newspapers and calculate the cost in terms of feet or yards. They share answers and explanations with classmates.
Worksheet
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Perimeter, Circumference, Volume, and Surface Area

For Students 8th - 11th
In this Perimeter, Circumference, Volume, and Surface Area activity, students are asked to identify geometric formulas and calculate for volume and surface area for geometric solids.  In addition, students are asked to identify...
Worksheet
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Value of Triangles

For Students 9th - 10th
In this geometry instructional activity, students identify the missing sides and angles of triangles. They find the midsegment of each triangle. There are nine questions with an answer key.
Lesson Plan
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Area and Perimeter

For Teachers 3rd - 5th
Students explore area and perimeter. In this math lesson plan, students differentiate between area and perimeter and compute the area and perimeter of an object.
Lesson Plan
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Polygon Perimeters

For Teachers 4th - 7th
Students define the terms polygon and perimeter to begin the lesson. Using a calculator, they practice determining the perimeter of various symbols in a painting. They discuss how geometry and art are related to one another.
Lesson Plan
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Polygon Perimeters

For Teachers 4th - 7th
Learners complete worksheets where they calculate the perimeter of polygons. In this perimeter of polygons lesson plan, students divide complex shapes into simple shapes to find the perimeter.
Worksheet
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Area and Perimeter of Various Shapes (H)

For Students 5th - 10th
In this area and perimeter worksheet, students find the area and perimeter of various shapes with numbers containing decimals. Students complete 6 problems.
Worksheet
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Area and Perimeter of Various Shapes

For Students 5th - 6th
In this area and perimeter worksheet, students find perimeter and area of 6 given shapes. An answer key and website reference are included.
Worksheet
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Finding Perimeter

For Students 2nd - 4th
In this finding perimeter worksheet, students sharpen their problem solving skills as they solve 6 story problems using the provided diagram.
Worksheet
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Perimeter and Circumference

For Students 7th - 8th
In this perimeter and circumference activity, students observe diagrams and determine their perimeter or circumference. Diagrams include triangles, circles, parallelograms, rectangles, and composite figures. This one-page activity...
Lesson Plan
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Area and Perimeter Problem Solving Retest

For Teachers 5th - 6th
In this math worksheet, students solve 6 story problems in which area or perimeter is calculated. These are construction related problems that students must solve and indicate if area or perimeter is used. The meaning of the title is...
Worksheet
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Classifying Triangles

For Students 10th
In this classifying triangles worksheet, 10th graders solve 9 various problems that classify triangles into categories. First, they refer to the figure shown of an isosceles triangle with two line parallel. Then, students name the sides,...
Lesson Plan
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The Sierpinski Triangle

For Teachers 9th - 10th
Students investigate the Sierpinski triangle. In this geometry lesson, students define fractal curves and its relationship to triangles. They identify repeating sequences and relate it to fractals.

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