+
Worksheet
Curated OER

Exploring Similar Polygons

For Students 10th
In this exploring similar polygons activity, 10th graders solve 9 various types of problems related to determining whether each polygon is similar or not. First, they write 3 equal ratios to show corresponding sides are proportional to...
+
Worksheet
Curated OER

Congruence of Triangles

For Students 10th
In this congruence of triangles instructional activity, 10th graders solve and complete 10 different problems that include measuring the congruence of various triangles. First, they determine the length of a third side of an isosceles...
+
Worksheet
Curated OER

Polygons

For Students 10th
In this polygons worksheet, 10th graders solve 18 various types of problems related to different forms of polygons. First, they state the number of sides for each convex polygon and then, use the polygon shown to respond to each of 6...
+
Worksheet
Curated OER

Triangles

For Students 6th - 10th
In this triangles worksheet, students solve for the missing angles and missing sides on the triangles given. Students complete 12 problems total.
+
Worksheet
Curated OER

Area of Parallelograms

For Students 10th
In this area of parallelograms worksheet, 10th graders solve 8 problems that include finding the area of various parallelograms. First, they find the area of each given figure in number 1-3. Then, students find the area of each shaded...
+
Worksheet
Curated OER

Sums of Angles in Polygons

For Students 5th - 6th
For this angles in polygons worksheet, students determine the sum of internal angles and calculate x. A reference web site is given for additional activities.
+
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.
+
Worksheet
Curated OER

Proofs

For Students 8th - 11th
In this geometric proof worksheet, students compose 20 triangle congruency proofs. Students will decide if there is enough information in problems 1-6 to prove if any triangles are congruent. In problems 17 to 20, students use given...
+
Worksheet
Curated OER

Classify and Measure Angles #1

For Students 2nd - 3rd
In this angles worksheet, students classify and measure 2 simple angles. Worksheet is part of a site with additional activities and links.
+
Printables
Chapman University

A Pythagorean-Style Proof of the Sine Sum-of-Angles Formula

For Teachers 10th - 12th
This well organized poster shows a step-by-step algebraic proof and related graphic. Understanding how formulas were derived, connects learners to the idea that the study of mathematics is continuous and cumulative. Learners will also...
+
Worksheet
Curated OER

Triangles

For Students 10th
In this triangles learning exercise, 10th graders solve 12 different problems that include various angles of triangles. First, they determine the measure of an exterior angle. Then, students determine the measure of any of the base...
+
Worksheet
Curated OER

Triangles

For Students 6th - 10th
In this triangles worksheet, students solve six word problems where they determine the angles measures in different triangles.
+
Interactive
Curated OER

All About Quadrilaterals

For Students 7th
For this quadrilateral post test worksheet, 7th graders answer ten multiple choice questions by solving questions based on quadrilaterals and angles of quadrilaterals. This is an interactive worksheet.
+
Lesson Plan
Improving Measurement and Geometry in Elementary Schools

The Sum of the Interior Angles of a Polygon

For Teachers 4th - 5th Standards
Junior geometers discover that polygons can be decomposed into triangles and that the number of triangles can be determined by a rule. Note that the Geometer’s Sketchpad® software is required to carry out all components of this lesson. 
+
Worksheet
Mt. San Antonio Collage

Properties of a Parallelogram

For Students 9th - 12th Standards
More than just a worksheet, the resource provides a thorough guide to navigate through the land of parallelograms. Filled with definitions and theorems, the resource supports learners through problems such as proofs and finding missing...
+
Worksheet
Curated OER

Circles Terminology Multiple Choice

For Students 9th - 12th
In this circles activity, high schoolers solve 10 multiple choice problems. Students answer questions about diameter and chord relationships, tangent lines to a circle, circumference, the Pi relationship, etc.
+
Worksheet
Curated OER

Triangle Fundamentals Homework

For Students 9th - 10th
In this geometry worksheet, students identify the missing angles of non right triangles using the angle sum theorem. They solve for the unknown using algebra. There are 21 questions.
+
Lesson Plan
Curated OER

Strongest Polygon

For Teachers 9th - 12th
Students define and identify shapes by name. For this geometry lesson, students construct, identify and compare polygons based on the number of sides. They classify each shape based on their angle sum theorem.
+
Lesson Plan
Curated OER

Why Does ASA Work?

For Teachers 9th - 10th Standards
Your geometry learners explore Angle-Side-Angle congruence in this collaborative task. The sum of the interior angles of all triangles being one hundred eighty degrees, is the key learners will discover as they explain their reasoning...
+
Lesson Plan
Curated OER

CORNER CABINET

For Teachers 9th - 10th
Ninth and tenth graders calculate the length, width, height, perimeter, area, volume, surface area, angle measures or sums of angle measures of common geometric figures. They solve problems involving scale drawings, models, maps or...
+
Lesson Plan
Curated OER

Geometry In Space

For Teachers 9th - 12th
How can we identify shapes in the Universe? High schoolers will compare and contrast elliptic and hyperbolic geometry. They will also explore one possible way to measure the curvature of the Universe, namely, by measuring the sum of the...
+
Lesson Plan
EngageNY

Similar Triangles in Circle-Secant (or Circle-Secant-Tangent) Diagrams

For Teachers 9th - 12th Standards
First angle measures, now segment lengths. High schoolers first measure segments formed by secants that intersect interior to a circle, secants that intersect exterior to a circle, and a secant and a tangent that intersect exterior to a...
+
Lesson Plan
EngageNY

Addition and Subtraction Formulas 2

For Teachers 11th - 12th Standards
Knowing the addition formulas allows for the calculations of double and half formulas. The fourth installment of 16 has the class use the addition formula to develop the double angle trigonometric formulas. Using the double formula,...
+
Lesson Plan
EngageNY

Addition and Subtraction Formulas 1

For Teachers 11th - 12th Standards
Show budding mathematicans how to find the sine of pi over 12. The third lesson in a series of 16 introduces the addition and subtraction formulas for trigonometric functions. Class members derive the formulas using the distance formula...

Other popular searches