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Lesson Plan
Willow Tree

Interior Angles, Exterior Angles, and Diagonals of Polygons

For Students 8th - 11th Standards
How does the number of sides of a polygon affect the angle measures? Learners recognize a pattern in finding the total measure of interior and exterior angles and the number of diagonals. They use the patterns to calculate the number of...
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Lesson Plan
Curated OER

Diagonals of Quadrilaterals

For Teachers 9th - 12th Standards
Teach your mathematicians how to identify different polygons based on their diagonals. Relating quadrilaterals to the different number of diagonals formed, high schoolers use the TI to create a visual of their shape.
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Lesson Plan
Curated OER

Polygons and Diagonals

For Teachers 6th - 9th
Students practice measuring the interior angles of given regular polygons and create a formula for finding the measure of th interior angles of any polygon. They determine the relationships between the number of vertices's or sides in a...
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Lesson Plan
Curated OER

Diagonals of Quadrilaterals

For Teachers 9th - 10th
Students find the diagonals of the quadrilaterals. For this geometry lesson, students identify and use properties of quadrilaterals. They define different parts of a quadrilateral shape.
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Lesson Plan
Curated OER

Going out of Business: Pythagorean Theorem

For Teachers 8th - 9th
Students find the length of diagonals.  In this Pythagorean theorem lesson, students use the Pythagorean theorem to determine the length of diagonals. 
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Lesson Plan
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Curated OER

Reflecting a Rectangle Over a Diagonal

For Teachers 7th - 9th Standards
Use the handout as guided or independent practice in drawing a reflection of a rectangle over a line. Three rectangles are provided for practice in addition to a critical thinking question.
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Lesson Plan
Curated OER

Diagonals and Altitudes

For Teachers 6th - 8th
Middle schoolers discover the mathematical way to find the dimensions of a diagonal. Using this process, they complete a worksheet in which they identify the relationships between different degree triangles. They review their answers...
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Lesson Plan
Curated OER

Geometry Journal: Isosceles Triangles

For Teachers 10th - 12th
In this isosceles triangles worksheet, students justify and determine the symmetry of an isosceles triangle. They explore the bisector of rectangles. This three-page worksheet contains two problems. Answers are listed on page three.
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Lesson Plan
Curated OER

A Fibonacci Primer

For Teachers 7th - 10th
Upper graders explore the Fibonacci sequence. They examine the characteristics of the Fibonacci sequence, list the properties of the sequence and determine how it connects to Pythagorean Triples. Related thinking questions are included.
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Lesson Plan
Curated OER

Eigenvalues, Eigenvectors, and Diagonalization

For Teachers Higher Ed
Students determine eigenvectors and eigenvalues for a matrix. Students diagonalize a matrix. Similar matrices are defined. Determinant formula is given for an degree n polynomial.
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Lesson Plan
Curated OER

Elements Picture Assignment

For Teachers 9th - Higher Ed
Students identify the basic structural and decorative designs, create examples of line (horizontal/vertical/curved/diagonal), as well as identify and explain the difference between shape and form. Then, they identify and explain the use...
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Lesson Plan
Curated OER

Trigonometry Involving Figures - Week 11

For Teachers 10th - 11th
In this trigonometry worksheet, students use trigonometric functions to determine the measurement of angles and the length of sides in given figures. Most figures are comprised of rectangles containing parallel and perpendicular lines,...
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Lesson Plan
Curated OER

Rhombi, Kites, and Trapezoids

For Teachers 9th - 12th Standards
Students identify the number of diagonals for each polygon. In this geometry lesson, students identify the polygons based on their diagonals and the way it intersect. They create visuals using the navigator to see the changes in the shapes.
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Lesson Plan
Curated OER

Diagonals to Quadrilaterals II

For Teachers 8th - 10th
Students identify the properties of different polygons. In this geometry lesson, students find the slope of a line and calculate the distance between two lines. They differentiate between similar and congruent polygons.
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Lesson Plan
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Curated OER

A Rectangle in the Coordinate Plane

For Teachers 7th - 9th Standards
A quadrilateral is drawn on the coordinate plane, and eighth grade geometers find the length of each side and the diagonals by applying the Pythagorean theorem. 
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Lesson Plan
Curated OER

Area of Polygons

For Teachers 10th
In this area of polygons worksheet, 10th graders solve and complete 12 various types of problems. First, they find the area of a given square. Then, students find the length of an original square as illustrated. They also write an...
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Lesson Plan
Curated OER

Word Kaleidoscope

For Teachers 4th - 5th
Students use a ruler to divide their paper into eight sections. They write words of importance to them in each section, using the shape of the section to form the word. Students color between letters and spaces with markers, creating a...
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Lesson Plan
Curated OER

5,6,7,8 Line Dance

For Teachers 4th - 11th
5,6,7,8 Line Dance is a very simple, but very fast-paced line dance. It is comprised of the grapvine steps, moving forward and backwards, moving diagonally, jumping, and clapping. There is a repeating section of the dance which calls for...
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Lesson Plan
Virginia Department of Education

Perfecting Squares

For Teachers 6th Standards
Here's a perfect way to introduce perfect squares. Individuals color in the diagonals of squares and record observations about patterns. They connect their diagrams to exponents of two and perfect squares.
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Lesson Plan
EngageNY

Graphs of Exponential Functions and Logarithmic Functions

For Teachers 10th - 12th Standards
Graphing by hand does have its advantages. The 19th installment of a 35-part module prompts pupils to use skills from previous lessons to graph exponential and logarithmic functions. They reflect each function type over a diagonal line...
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Lesson Plan
Curated OER

Discovering Art - Scott Gallery: Line

For Teachers K - 3rd
Students study how line is used in art. They identify horizontal, vertical, and diagonal lines in artwork. They view the painting, The Western Brothers, and identify the line the dog makes and the position of the boy's arm. They discuss...
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Lesson Plan
EngageNY

Searching a Region in the Plane

For Students 9th - 12th Standards
Programming a robot is a mathematical task! The activity asks learners to examine the process of programming a robot to vacuum a room. They use a coordinate plane to model the room, write equations to represent movement, determine the...
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Lesson Plan
EngageNY

Applications of the Pythagorean Theorem

For Students 8th Standards
Begin seeing the world through the lens of geometry! Use the 19th installment in a 25-part module to apply the Pythagorean Theorem to solve real-world problems. Individuals sketch situations resulting in right triangles such as the...
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Lesson Plan
Curated OER

Geometry: Cut, Construct and Think

For Teachers 5th - 8th
Students explore polygons. In this geometry skills lesson, students complete an activity that requires them to solve geometry problems that involve polygons as they piece together geometric shapes. Students analyze the shapes they create...

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