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Worksheet
Curated OER

Geometry Quiz

For Students 9th - 12th
In this geometric quiz worksheet, students complete 5 problems involving segment addition, distance formula, and solving equations.
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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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Worksheet
Mt. San Antonio Collage

Isosceles Triangles and Special Line Segments

For Students 9th - 12th Standards
Under which conditions can a triangle be classified as isosceles? High schoolers practice identifying isosceles triangles and special line segments, including angle bisectors, medians of triangles, and perpendicular bisectors of sides of...
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Worksheet
Curated OER

Triangles

For Students 10th
In this geometry worksheet, 10th graders solve problems involving triangular inequality. They apply the proofs and theorem of triangles to solve these problems. There is an overview and one question.
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Worksheet
Curated OER

Angles in Polygons

For Students 10th
In this geometry activity, 10th graders solve problems involving quadrilaterals using the angle sum of quadrilaterals. They solve for linear pairs, opposite angle theorem and triangular angles. There are 5 questions.
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Worksheet
Curated OER

Challenge: Skills and Applications Lesson 3.4

For Students 9th - 10th
In this geometry worksheet, students identify the missing angles formed by parallel lines and a transversal. They differentiate between parallel and perpendicular lines. There are four questions.
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Worksheet
Curated OER

Midpoint

For Students 10th
In this geometry worksheet, 10th graders use the concept of midpoint of a line segment to solve problems in which they determine the length of the indicated segments.  The one page worksheet contains twelve problems, including a...
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Lesson Plan
Virginia Department of Education

Similar Triangles

For Teachers 9th - 11th Standards
Pupils work in pairs to investigate what it takes to prove that two triangles are similar. They work through various shortcuts to find which are enough to show a similarity relationship between the triangles. Small groups work with the...
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Assessment
Inside Mathematics

Circles in Triangles

For Teachers 9th - 12th Standards
Challenge the class with inscribed circles in triangles. The assessment task requests class members use their knowledge of circles and right triangles to prove two triangles are congruent. They go on to utilize their knowledge of...
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Lesson Plan
Virginia Department of Education

Circles in the Coordinate Plane

For Teachers 9th - 11th Standards
Make the connection between the distance formula and the equation of a circle. The teacher presents a lesson on how to use the distance formula to derive the equation of the circle. Pupils transform circles on the coordinate plane and...
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Assessment
Mathematics Assessment Project

Square

For Students 8th - 12th Standards
Don't be a square! Young mathematicians determine the slope and length of a line segment. They then prove whether four given coordinate points form a square.
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Worksheet
Curated OER

Points, Lines and Planes

For Students 10th
For this points, lines and planes worksheet, 10th graders solve and complete 9 various types of problems. First, they name the planes that intersect a figure shown. Then, students determine the points that are collinear and coplanar in...
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Worksheet
Curated OER

Challenge: Skills and Applications Lesson 1.3

For Students 10th - 12th
In this skills worksheet, students explain the Segment Addition Postulate, provide examples and counter examples and determine congruent line segments.  This one-page worksheet contains 11 multi-step problems.
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Worksheet
Curated OER

Tests for Parallelograms

For Students 10th
In this tests for parallelograms learning exercise, 10th graders solve 7 various types of geometry problems that include parallelograms. First, they determine if each quadrilateral is a parallelogram and justify their answers. Then,...
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Worksheet
Curated OER

Six Solve Algebraic Properties and Justify Steps

For Students 8th - 10th
In this solving linear equations worksheet, learners solve six equations and justify each step of their proofs by stating the algebraic property used.
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Worksheet
Curated OER

Angles and Parallel Lines Homework

For Students 9th - 10th
For this geometry worksheet, students identify the angles formed by parallel lines and a transversal. They differentiate between the angles of a transversal and that of a perpendicular line. There are 14 questions.
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Worksheet
Curated OER

Congruent Triangles

For Students 10th
In this geometry learning exercise, 10th graders identify the corresponding parts of congruent triangles.  The one page learning exercise contains four problems.  Answers are not provided. 
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Worksheet
Curated OER

Parallelograms

For Students 9th - 10th
In this geometry worksheet, students identify properties of parallelograms. They use proof to justify their answers using quadrilaterals and parallelograms. there are 25 questions.
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Lesson Plan
EngageNY

Tangent Segments

For Teachers 9th - 12th Standards
What's so special about tangents? Learners first explore how if a circle is tangent to both rays of an angle, then its center is on the angle bisector. They then complete a set of exercises designed to explore further properties and...
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Lesson Plan
EngageNY

Three-Dimensional Space

For Teachers 9th - 10th Standards
How do 2-D properties relate in 3-D? Lead the class in a discussion on how to draw and see relationships of lines and planes in three dimensions. The ability to see these relationships is critical to the further study of volume and other...
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Worksheet
Curated OER

Write the Counterexample

For Students 8th - 11th
In this counterexample worksheet, students provide counterexamples for the four given statements.  The solutions are not provided.
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Worksheet
Curated OER

Challenge: Skills and Applications Lesson 3.3

For Students 9th - 12th
In this angle measures activity, students solve 9 short answer problems. Students find values for x and y given two parallel lines cut by a transversal. Students use alternate interior, supplementary, and exterior angles to find x and y.
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Worksheet
Curated OER

Logical Relationship of Postulates & Theorems

For Students 10th - 12th
In this postulates and theorems worksheet, students explore a concept map containing information about angles and sides, alternate interior angles, and diagonals of a parallelogram.  They use the concept map to prove theorems dealing...
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Worksheet
Curated OER

Parallel Lines

For Students 10th
For this parallel lines worksheet, 10th graders solve and complete 16 different types of problems. First, they name the lines that are parallel to those listed. Then, students find that values that make each set of line parallel. They...

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