Lesson Plan
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Word Problems: Geometry

For Teachers 5th - 8th
Young scholars solve word problems by using basic geometry. For this geometry lesson, students use geometric formulas to find the perimeter, area, and volume of objects. Young scholars complete a worksheet.
Lesson Plan
Curated OER

That Rascal Pascal

For Teachers 4th
Fourth graders use the concept of number patterns to complete a portion of Pascal's Triangle as well as identify and describe the patterns represented.
Lesson Plan
Curated OER

The X-33 and the X-38

For Teachers 5th - 8th
Students explore the relationships among the lengths, areas, and volumes of similar solids. They also discover what effect doubling the dimensions of a figure has on the resulting area.
Lesson Plan
Curated OER

Math: Tangents

For Teachers 9th - 10th
Pupils discover how to recognize tangents and how to use their properties. They investigate and use the properties of angles, arcs, chords, tangents, and secants. Students use two tangents and the properties of similar triangles to...
Lesson Plan
Curated OER

The Law of Sines

For Teachers 11th - 12th
Students define the laws of sine as it relates to a right triangle. In this trigonometry lesson, students identify the properties of sine to help then find mixing sides of a right triangle. They also solve for the missing angles.
Lesson Plan
Curated OER

Pythagorean Relationships

For Teachers 9th - 12th Standards
Oh that Pythagorean Theorem is so useful. Learners engage in a 45 minute learning activity that requires them to solve for missing angles and sides of a right triangle. They'll use the Pythagorean Theorem to find the rations of sides and...
Worksheet
Curated OER

Solve Word Problems with Geometry

For Students 7th - 12th
In this geometry worksheet, students solve word problems having to do with lines, angles, shapes, area, perimeter, and more. Students complete 57 problems total.
Worksheet
Curated OER

Wrecked Angle

For Students 9th - 10th
For this geometry worksheet, students answer questions about triangles and trapezoids as it related to the area of a shape. They make their own polygons and calculate the area.
Lesson Plan
Curated OER

Geogebra Basics

For Teachers 9th - 11th
Students identify basic geometric shapes using Geogebra. In this geometry lesson, students work on a laptop as they explore different geometric shapes. They calculate the area and perimeter of triangles.
Lesson Plan
Texas Instruments

The Determinant of a Matrix

For Teachers 9th - 12th Standards
Students calculate the determinant. In this algebra activity, students find the determinant and use to calculate the area of a triangle. They calculate the area of a quadrilateral in a plane.
Worksheet
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The Theorem of Pythogoras

For Students 9th - 10th
In this geometry worksheet, students solve right angle triangles using the Pythagorean Theorem. They calculate the area and sides of triangles and circles. There are 52 questions total.
Lesson Plan
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Angles and Similarity

For Teachers 9th - 12th Standards
Learners identify triangles as similar or congruent. In this geometry lesson, students drag triangles around on the navigator to see the effect of different angles on the shape of the triangle. They discuss angle similarity and angle...
Lesson Plan
Texas Instruments

REAL LIFE REAL WORLD Activity - Surveyor

For Teachers 9th - 12th Standards
Learners investigate surveying in this secondary mathematics lesson. They will explore a real world application of geometry and trigonometry as they create a plot plan using a geometry utility and calculate the area of the land parcel.
Worksheet
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Similar Figures

For Students 10th
In this geometry worksheet students explore similar polygons and determine measure of missing sides and angles. Students use indirect measurement with similar triangles and determine the area and volume of similar figures. The seven...
Worksheet
Curated OER

Geometric Concepts and Polygons

For Students 9th - 11th
In this geometry worksheet, students identify the altitude, perpendicular bisector, median, angle bisector and the area of different polygons. There are 33 problems.
Worksheet
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Quadratics with Irrational Solutions

For Students 8th - 11th
In this algebra worksheet, students apply the concepts of a right triangle to help them solve for the missing sides of a triangle. They use the quadratic formula to solve word problems. There are 5 problems with an answer key.
Lesson Plan
Curated OER

Introduction to Fractals: Geometric Fractals

For Teachers 6th - 8th
Students study and observe the patterns made by the areas of the Sierpinski Triangle. Students use the computer to draw two or three iterations to discover the number patterns. Students complete worksheets based on Geometric Fractals.
Worksheet
Curated OER

Count and Trace the Shapes

For Students 2nd - 4th
In this counting and tracing shapes worksheet, students trace 13 shapes with specific colors. Students count how many ovals, rectangles, triangles, squares and circles there are and put their totals on the lines provided. A very good...
Lesson Plan
Curated OER

Effects of Changing Dimensions Proportionally

For Teachers 10th
In this geometry worksheet, 10th graders examine the effect of changing the dimensions of a figure proportionally on the perimeter, circumference, and area.  The one page worksheet contains six problems.  Answers are...
Lesson Plan
Curated OER

Ratios of Similar Figures

For Teachers 9th - 12th Standards
Students identify the ratios of different triangles. In this geometry lesson plan, students identify the similarity and differences of triangles. They use the navigator to move the sides of the triangle around.
Worksheet
Curated OER

Inequalities

For Students 10th
In this inequalities instructional activity, 10th graders solve and complete 23 various types of problems. First, they find the area of an inscribed square in a circle shown. Then, students find the total area of the inscribed polygon...
Worksheet
Curated OER

Expressions and Formulas

For Students 9th
In this expressions and formulas worksheet, 9th graders solve and complete 7 different types of problems related to various expressions and formulas. First, they define order of operations and explain why it is used. Then, students list...
Lesson Plan
Curated OER

Similar Figures

For Teachers 9th - 12th Standards
Your class will use a TI calculator to drag vertices of rectangles and triangles to observe what happens to ratios of pairs of sides within each figure. They will apply the definition of similarity to identify similar shapes. The...
Lesson Plan
Curated OER

Trigonometry Ratios

For Teachers 9th - 12th Standards
Learners identify the different angles and sides of a triangle. In this geometry lesson, students identify the six trigonometric ratios. They graph the graph of each trig function and analyze it.

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