Illustrative Mathematics
The Geometry of Letters
Use the alphabet as a tool for teaching your class about geometric figures. Break apart capital letters into line segments and arcs. Classify angles as right, acute, or obtuse. Identify parallel and perpendicular lines. An excellent...
Curated OER
Countdown Challenge: Geometry Exploration
In this geometry worksheet, students identify and draw right angles, acute angles, obtuse angles and straight angles. This one-page worksheet contains 34 problems.
K12 Reader
Kinds of Angles
Have you ever wondered how circles and angles relate to each other? Read a passage about right angles, acute angles, and obtuse angles, and answer reading comprehension questions about the information you learn.
McGraw Hill
Lines and Angles
Why was the obtuse angle upset? Because it was never right! A valuable resource is loaded with background information on types of angles and lines. Learners review the characteristics of parallel, perpendicular, and...
Curated OER
Classifying Angles
In this classifying angles worksheet, 7th graders identify and complete 17 different angles illustrated on the sheet. First, they use the key given to outline each angle. Then, students use a protractor to measure each angle and...
McGraw Hill
Triangles
After reviewing characteristics of seven types of triangles, young geometers discover how to find the missing angle of a triangle. Then, they practice identifying triangles, find missing angles, and find missing side lengths of...
Curated OER
Acute or Obtuse Angles
In this geometry worksheet, students view ten angles of varying degrees and identify if the angle is acute or obtuse. The students write the answer on the lines provided.s
DK Publishing
Using a Protractor
Learn how to measure acute, right, and obtuse angles with a protractor. After reviewing the way the protractor works, fourth graders measure nine angles on their own. For extra practice, have them measure different angles in their...
Curated OER
Identify different types of angles
In this angles worksheet, students identify angles as either being acute, obtuse, right, or straight. Students identify 4 angles.
Curated OER
Angles and Measuring
Learners identify various angles and how to measure each type. They use a protractor to measure each of the angles. Students also write the name of the angle and identify the number of degrees for each.
Curated OER
Informal Geometry
Middle and high schoolers solve and complete 29 various types of problems. First, they match each name with its correct formula. Then, students find the length of the missing side and the distance between the two points given. In...
Curated OER
Shapes and Angles
Are your geometry whizzes learning about angles and shapes? This online activity gives 10 multiple choice questions based on images and word problems. Concepts include deducting angle degree, classifying shapes, and identifying angle...
Curated OER
Exploring Angles
In this exploring angles instructional activity, 10th graders solve 6 various problems of geometry by identifying various types of angles. First, they use the figure shown to list all the angles that have W as the vertex and then, name...
Curated OER
Angles ~ Right Angles
Have your class review how to identify right angles. Learners identify right angles, and then write the number of angles found in each shape.
Curated OER
Geometry Worksheet: Angle (2)
In this geometry learning exercise, students find the measure of missing angles. They identify alternate angles. This one-page learning exercise contains two problems.
Curated OER
Identify the Angles
In this geometry worksheet, students identify angles using a word bank. They differentiate between obtuse, acute or right angle.
Curated OER
Naming Angles
In this naming angles worksheet, students name each angle shown as an acute, obtuse or right angle, 12 angles total. Answers included on page 2.
Curated OER
Naming Angles: Worksheet 2
In this naming angles worksheet, students name each angle shown as acute, obtuse or right, 12 angles total. Answers are included on page 2.
Virginia Department of Education
How Many Triangles?
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...
Curated OER
Classifying and Measuring Angles
In this classifying and measuring angles activity, 10th graders solve and complete the measures of various types of angles. They determine whether each angle drawn is a straight, right, obtuse, acute, or reflex angle. Then, students...
Curated OER
Identify Angles
In this angles practice worksheet, students respond to 4 questions that require them to identify the pictured angles as acute, right, or obtuse triangles.
Curated OER
Identifying Angles
In this angles practice worksheet, students respond to 4 questions that require them to identify the pictured angles as acute, right, or obtuse angles.
Curated OER
Rallytable Angle Measuring
In this geometry worksheet, students measure various angles. First, they write what type of angle each one is, whether right, acute, or obtuse. Then students estimate the measurement and then write the actual measurement for each angle.
Curated OER
Measuring and Classifying Angles
In this measuring and classifying angles worksheet, 6th graders select the type of angle (acute, right, obtuse, straight) for 6 drawings, then use a protractor to measure each angle.