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Worksheet
Curated OER

Maximum and Minimum Problems

For Students 11th - Higher Ed
In this maximum and minimum problems worksheet, students solve and complete 9 various types of problems. First, they find two numbers with a given sum. Then, students find the maximum and minimum value of each equation. They also find...
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Worksheet
Curated OER

Quadrilaterals and their Diagonals

For Students 10th
In this quadrilaterals and their diagonals instructional activity, 10th graders solve 3 problems related to determining various types of quadrilaterals. First, they draw the diagonals for each of the quadrilaterals and determine for...
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Worksheet
Curated OER

Congruent Triangles

For Students 10th
In this congruent triangles worksheet, 10th graders solve and complete 10 different problems that involve various congruent triangles. First, they determine the length of the third side given the other two. Then, students determine the...
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Worksheet
Curated OER

Cosine

For Students 10th
In this cosine learning exercise, 10th graders solve 10 different problems that include various measures of angles. They determine the value of x in each problem using the cosine of the given angle. Then, students substitute the answer...
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Worksheet
Curated OER

Easy Worksheet: Types of Triangles

For Students 9th - 12th
In this types of triangles worksheet, students solve 6 short answer problems. Students identify the type of triangle being described according to side length or angle measure.
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Lesson Plan
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Illustrative Mathematics

Right Triangles Inscribed in Circles I

For Teachers 9th - 10th Standards
One of the basic properties of inscribed angles gets a triangle proof treatment in a short but detailed exercise. Leading directions take the learner through identifying characteristics of a circle and how they relate to angles and...
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Lesson Plan
Willow Tree

Angle Sum Property of Triangles

For Students 8th - 11th Standards
All triangles have some things in common. Using these properties of triangles, learners find missing angle measures. Scholars use the Angle Sum Property and properties of special triangles throughout the lesson.
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Lesson Plan
Willow Tree

Common Geometric Figures

For Students 8th - 11th Standards
Geometry could be called the study of figures. An overview of the figures found in a typical geometry course contains a study of different triangles, quadrilaterals, and regular polygons. 
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Assessment
Bowland

Rods and Triangles

For Teachers 6th - 9th
Scholars explore triangles with rods of different lengths. Using rods of 2, 4, 6, 8, and 10 cm class members build as many different types of triangles as they can. They also describe properties of these triangles and determine...
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Lesson Plan
Virginia Department of Education

How Many Triangles?

For Teachers 9th - 11th Standards
Something for young mathematicians to remember: the sum of any two sides must be greater than the third. Class members investigates the Triangle Inequality Theorem to find the relationship between the sides of a triangle. At the same...
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Lesson Plan
Virginia Department of Education

Properties of Quadrilaterals

For Teachers 9th - 11th Standards
What type of quadrilateral is that? Discover the difference between the types of quadrilaterals. Small groups investigate types of quadrilaterals using geometry software to find their properties. To keep track of the different...
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Lesson Plan
Curated OER

Exploring Triangles

For Teachers 1st - 12th
Students research the different types of triangles, including right, isosceles, scalene, and equilateral triangles. They identify the characteristics of various types of triangles and then draw them using appropriate vocabulary to...
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Worksheet
Curated OER

Geometric Shapes and Angles

For Students 10th
In this geometry worksheet, 10th graders review polygons and solve for the missing angles of trapezoids and isosceles triangles. There are 10 questions on this worksheet with an answer key.
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Worksheet
Curated OER

Rate of Change

For Students 11th - 12th
For this calculus worksheet, students calculate the rate of change in an isosceles trapezoid. They take the derivative to find their answer.
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Worksheet
Curated OER

Squares, Shaded Area

For Students 9th - 12th
In this secondary mathematics instructional activity, students are provided with a figure that consists of squares and isosceles triangles and must determine the percent of the figure that is shaded. The one page instructional activity...
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Assessment
Concord Consortium

Circling Trains

For Students 7th - 12th Standards
And round and round the park we go! Given a description of an amusement park with the locations of three attractions connected by walkways, learners consider what happens when additional attractions join the mix by doubling the length of...
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Unit Plan
Radford University

Natural Disaster Recovery and Quadrilaterals: Trapezoids and Land Assessments

For Students 9th - 12th Standards
After a tornado, an insurance company is in need of finding the area of a plot of land. Pupils use their knowledge of trapezoids and area formulas to calculate the area of the plot of land. The scholars work in groups to justify the...
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Unit Plan
Radford University

Quadrilaterals

For Students 9th - 12th Standards
Connect the quadrilaterals. Working in teams, pupils use a variety of tasks to make connections between special quadrilaterals. With the properties well defined, the groups construct quadrilaterals based on those properties. Learners...
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Interactive
CK-12 Foundation

Special Triangle Ratios: Special Right Triangle Ratios

For Students 9th - 12th Standards
Go from one side length to any other side length with special right triangles. Individuals use the interactive to investigate the ratio of sides in 45-45 and 30-60 right triangles. Scholars make generalizations about the types of special...
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Lesson Plan
Alabama Learning Exchange

What You Know About the Bermuda Triangle?

For Teachers 9th - 12th Standards
Get lost in the classifications. Using the backdrop of the Bermuda Triangle, pupils classify it by angle and side measures. They also learn information about the triangle and its history.
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Lesson Plan
Curated OER

Triangle Classification

For Teachers 9th - 12th
Students classify different types of triangles. For this geometry lesson, students identify and use properties of triangles. They differentiate between isosceles and equilateral triangles.
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Lesson Plan
Curated OER

Special Right Triangles

For Teachers 9th - 10th
Young scholars identify different types of special right triangles. For this geometry lesson, students differentiate between right triangles and isosceles triangles. they construct the triangles using geometry software and make...
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Worksheet
Curated OER

Trapezoids and Kites Homework

For Students 9th - 11th
In this quadrilaterals worksheet, students find the missing measurements of side lengths and angles in isosceles trapezoids and kites.
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Worksheet
Curated OER

Trapezoids and Kites Multiple Choice

For Students 9th - 12th
In this trapezoids worksheet, students solve 6 multiple choice problems. Students find the lengths of the bases of a trapezoid given a ratio and median length. Students find unknown angle measures of kites and trapezoids given a sketch.

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