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Assessment
Inside Mathematics

Rhombuses

For Teachers 9th - 12th Standards
Just what does it take to show two rhombuses are similar? The assessment task asks pupils to develop an argument to show that given quadrilaterals are rhombuses. Class members also use their knowledge of similar triangles to show two...
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Lesson Plan
Curated OER

Parallel and Perpendicular Lines and Lines of Symmetry: Rhombus Shadowing

For Teachers 5th
Fifth graders demonstrate different types of lines using movement. For this line and movement lesson, 5th graders demonstrate parallel and perpendicular lines, and lines of symmetry using dance movement. They also demonstrate rhombus...
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Lesson Plan
Curated OER

Developing Formulas for Triangles and Quadrilaterals

For Teachers 10th
In this geometry worksheet, 10th graders determine the area of triangles, parallelograms, trapezoids, kites, and rhombuses. The one page worksheet contains eleven problems. Answers are included.
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Worksheet
Curated OER

Naming Polygons

For Students 3rd - 4th Standards
What polygon is this? Young geometers categorize shapes by circling all the quadrilaterals in a set of figures. Next, they write the names of 10 polygons using a visual guide as reference. Review the guide together before they start if...
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Worksheet
Curated OER

Naming Quadrilaterals

For Students 3rd
Scholars examine six common quadrilaterals and identify each by writing its name beneath the shape. Next, they sketch four shapes: parallelogram, rectangle, rhombus, and trapezoid. Once finished, review which features helped learners...
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Worksheet
Curated OER

Understanding Categories of Shapes

For Students 2nd - 3rd
What are these shapes? Here are four shapes with some common attributes: they each have four parallel sides and four vertices. Scholars identify a rectangle, rhombus, square, and quadrilateral. Because there is an explanation written...
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Worksheet
Curated OER

Understanding Categories of Shapes

For Students K - 3rd
What are these shapes? Scholars match seven shapes to their names: rhombus, sphere, square, cone, circle, triangle, and parallelogram. Although there isn't much to this worksheet, the shapes are nicely colored and it would make a good...
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Worksheet
Curated OER

Area of Rhombus

For Students 4th - 5th
In this area of rhombus worksheet, students find the area of rhombus whose diagonals are given, 4 total. Work space is provided. Answers are included on page 2.
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Worksheet
Curated OER

Quadrilaterals

For Students 10th
In this quadrilaterals worksheet, 10th graders solve and complete 22 various types of problems. First, they state the specific name for each shape illustrated. Then, students use the properties of a rhombus, rectangle, or square to solve...
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Worksheet
Curated OER

Properties of Quadrilaterals

For Students 9th - 11th
In this properties of quadrilaterals learning exercise, students use the properties of quadrilaterals to find the perimeter, angle measurement or length of a missing side of a given polygon. Examples and explanations of the properties...
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Worksheet
Curated OER

Transformations and Congruence

For Students 10th
In this transformations and congruence learning exercise, 10th graders solve and complete 5 different types of problems. First, they calculate the length of a line giving their answer in 3 significant figures. Then, students prove that...
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Worksheet
Curated OER

Right Triangles

For Students 10th
In this right triangles worksheet, 10th graders solve and complete 14 various types of problems. First, they find the perimeter of the isosceles trapezoid shown. Then, students find the measures of each marked side of a right triangle....
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Lesson Plan
Curated OER

Areas of Trapezoids, Rhombuses and Kites

For Teachers 8th - 10th
Students calculate the area of different polygons. For this geometry lesson, students find the area for trapezoids, rhombuses and kites.
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Worksheet
Curated OER

Trapezoids

For Students 9th - 12th
In this trapezoids learning exercise, student solve 46 fill in the blank problems. Students find unknown side lengths and angle measures of an isosceles trapezoid and a rhombus.
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Lesson Plan
Illustrative Mathematics

Grandfather Tang's Story

For Teachers K - 2nd Standards
It's amazing the complex figures that can be made using only a few simple shapes. Following a class reading of the children's book Grandfather Tang's Story by Ann Tompert, young mathematicians use sets of tangrams to create models of the...
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Instructional Video4:47
Corbett Maths

Construct a 30 Degree Angle

For Students 8th - 11th Standards
Split it down the middle. Using the tools of geometric construction, the video shows two different methods of constructing a 30-degree angle. The first method bisects an angle of an equilateral triangle. The second uses the diagonal of a...
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Printables
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K-5 Math Teaching Resources

Pattern Blocks

For Students Pre-K - 2nd Standards
Who needs to buy pattern blocks when you have this printable pattern block template? Including triangles, squares, trapezoids, rhombuses, and hexagons, this resource offers endless possibilities for teaching children about geometric shapes.
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Worksheet
Curated OER

Squares and Rhombi

For Students 10th
In this squares and rhombi worksheet, 10th graders solve 8 different problems with quadrilaterals, especially the square and rhombus. First, they use the given rhombus and the given information to find the value for each statement. Then,...
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Interactive
Curated OER

Special Right Triangles Multiple Choice

For Students 9th - 11th
In this length worksheet, students answer five multiple choice questions concerning lengths using rules of various figures including, triangles, rhombus, diamonds, and circles.
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Worksheet
Curated OER

Drawing Quadrilaterals

For Students 6th - 8th
In this math worksheet, learners draw quadrilaterals and also find the sums of the inner angles for each. They practice drawing rhombuses as unique quadrilaterals.
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Worksheet
Curated OER

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...
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Worksheet
Curated OER

The Pascal Problem

For Students 7th - 12th
In this Pascal worksheet, students begin at the center of a rhombus to identify the number of ways the word "Pascal" may be found.  This one-page worksheet contains 1 puzzle.  The answer is provided at the bottom of the page.
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Worksheet
Curated OER

Rhombi and Squares

For Students 9th - 11th
In this quadrilateral worksheet, students find the missing measurements in squares and rhombuses in one hundred fifty-two problems.
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Lesson Plan
Curated OER

Investigation-Looking at Polygons

For Teachers 8th
Eighth graders plot points and investigate polygons. They locate a point, using ordered pairs of integers on the coordinate plane. Students compare geometric measurements and computations on coordinate axes as they are applied to...

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