Lesson Plan
Curated OER

Congruent Triangles - Is This Enough Information?

For Teachers 7th
Seventh graders examine congruence postulates and apply knowledge to triangles in the world around them.
Lesson Plan
Curated OER

Triangle Explorer

For Teachers 3rd - 6th
Students compute the area of triangles in a computer program. In this measurement lesson plan, students complete 5 easy, 5 medium, and 5 hard problems.
Lesson Plan
Curated OER

Looking at Circumference

For Teachers 6th - 8th
Students understand where the number for pi comes from. They understand and use the formula for circumference. Students measure the circles given out and the diameters of those circles and record the results on their worksheet.
Assessment
Concord Consortium

Rectangulating

For Students 9th - 12th Standards
Use rectangles to find distances. Given a rectangle and three associated triangles, pupils determine the area of the triangles. Scholars know the three triangles have equal areas along with the perimeter of the rectangle and two other...
Performance
Radford University

Finding the Largest Possible Area

For Teachers 9th - 12th Standards
If you want a bigger garden, here's a task for you. Given the perimeter of a triangular garden, scholars determine the largest possible area. They then generalize their findings and extend the idea to other polygons.
Assessment
Concord Consortium

Rectangle Space

For Students 9th - 12th Standards
Take a coordinated look at rectangles. The task asks pupils to plot the length and width of created triangles in the coordinate plane. Using their plots, scholars respond to questions about rectangles and their associated points on the...
Worksheet
Curated OER

Perimeter and Area of Triangles 2

For Students 5th
For this measurement worksheet, 5th graders study the different triangles and then use the given measurements to find the perimeter and area for each.
Worksheet
Curated OER

Calculating the Area of a Triangle

For Students 5th
A quick definition and the formula for finding the area of a triangle is provided at the top of this instructional activity. After reading the description, 5th graders must find the area of the 3 given triangles. This is an excellent...
Worksheet
Curated OER

Grade 5 Geometry

For Students 5th
In this grade five geometry worksheet, 5th graders utilizing mathematical strategies to calculate the perimeter of a triangle. Students recognize that the perimeter of a triangle is side a plus side b plus c.
Worksheet
Curated OER

Find the Area or Missing Length of the Polygon

For Students 7th - 10th
For this area and perimeter worksheet, students find the length or area of seventeen figures.  The figures examined are triangles, trapezoids, parallelograms, rectangles, and hexagons.  Some examples and solutions are...
Worksheet
Curated OER

Area, Perimeter and Volume

For Students 7th - 8th
In this area, perimeter and volume worksheet, students solve and complete 12 various types of problems. First, they calculate the value for each variable in the triangle shown. Then, students find the distance of the ladder against a...
Lesson Plan
Curated OER

What Goes Around

For Teachers 4th
Fourth graders investigate the relationships between the area and perimeters of squares and rectangles. They calculate the perimeter of rectangles and squares using a formula. Students investigate the relationship between the perimeter...
Lesson Plan
Curated OER

Pythagorean Theorem

For Teachers 9th - 12th
Students are introduced to the Pythagorean theorem. They use three different activities that give students the opportuntiy to observe triangles, and use the Pythagorean theorem and practice different ways of determining areas of...
Worksheet
Curated OER

SAT Grid Practice Test 11

For Students 9th - 11th
In this SAT practice test, students compute the area and perimeter of polygons.  They determine the volume of a cylinder and solve problems with exponents.  This one-page activity contains 10 problems.  Answers are provided.
Worksheet
Curated OER

Parallel Lines and Proportional Parts

For Students 10th
In this parallel lines and proportional parts worksheet, 10th graders solve 6 problems that include applying the theorems involved in proportional parts of triangles. First, they identify and describe each theorem. Then, students find...
Lesson Plan
Curated OER

Surface Area with Polydrons

For Teachers 3rd - 4th
Students explore measurements by analyzing geometric shapes. In this surface area lesson, students identify the terms volume, weight, perimeter and area in order to find the requested measurements of specific polygons. Students utilize...
Worksheet
Curated OER

Adding and Subtracting Polynomials

For Students 9th
In this polynomials worksheet, 9th graders solve and complete 17 different problems that include adding and subtracting various polynomials. First, they determine the sum or difference of each equation listed, combining like terms when...
Lesson Plan
Curated OER

How Big Is It?

For Teachers 5th
Fifth graders look at the Garrison flag and estimate how big it is. For this measurement lesson plan, 5th graders then calculate the area and perimeter of the flag.
Lesson Plan
Curated OER

Investigating Scale Factors with the Geometer's Sketchpad

For Teachers 7th - 12th
Pupils use Geometer's Sketchpad to examine the scale factor when in is applied to the length of a figure's sides. They look at how the scale factor affects the side lengths, perimeter, and area of the figure that result. They work with...
Lesson Plan
Curated OER

NON-EUCLIDEAN GEOMETRY.

For Teachers 8th - 9th
Students study relationships between angles, side lengths, perimeters, areas and volumes of similar objects. In this instructional activity students also create and critique inductive and deductive arguments concerning congruency,...
Assessment
Mathematics Assessment Project

Pythagorean Triples

For Students 8th - 10th Standards
What special relationships exist in right triangles? In the high school performance task, learners investigate Pythagorean triples. They then determine rules for the perimeter and area of right triangles given the shortest side.
Lesson Plan
Curated OER

Worksheet #4: Simplify Algebraic Expressions With Two Variables

For Teachers 9th - 10th
In this algebraic expression worksheet, students simplify algebraic expressions and solve proportions, and write equations from story problems. Thirteen of the 49 problems are fill in the blank, and the remainder are multiple choice.
Lesson Plan
Curated OER

Perimeter and Area of Rectangles

For Teachers 6th
Sixth graders solve for the area and perimeter. In this geometry lesson, 6th graders investigate polygons and use a formula to find the area and perimeter. They find the area and perimeter of various polygons.
Lesson Plan
Curated OER

Similar Triangles - Geometry Exploration

For Teachers 8th
Eighth graders become engaged in a lesson in geometry to improve mathematical skills. They construct triangles, segments, and points using Geometer's Sketchpad to demonstrate how dilations of triangles and rectangles change geometric...

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