Curated OER
Basic Right Triangles
Elementary schoolers examine the attributes of triangles. In this triangle lesson plan, learners compare regular triangles and right triangles. They explore vertices and angles and investigate obtuse and acute angles. Pupils draw...
Curated OER
Parallel and Perpendicular Lines
Learners study parallel and perpendicular lines. For this parallel and perpendicular lesson, pupils explore 2-D shapes and determine if the sides are parallel or perpendicular.
Curated OER
Right On/Right Angles
Help your class identify right triangles using this resource. This series of slides involves pictures of clocks with hands forming right angles. It's an interesting way to introduce this topic.
Curated OER
Special Right Triangles Multiple Choice
In this length worksheet, students answer five multiple choice questions concerning lengths using rules of various figures including, triangles, rhombus, diamonds, and circles.
Curated OER
The Right Angle
In this algebra worksheet, students rewrite word problems using an algebraic equation to find the answer. There are 14 questions with an answer key.
Curated OER
Identify the angles - acute, right, obtuse, and straight
In this angles worksheet, students draw the angles described to them and then decide whether it is an acute, right, obtuse, or straight angle. Students complete 4 problems.
Curated OER
Identifying Angles
In this angles practice instructional activity, learners respond to 4 questions that require them to identify the pictured angles as acute, right, or obtuse angles.
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
Angle Comparison to Right Angles
In this angles activity, students solve 4 problems in which an angle is analyzed and measured. Students tell if each angle is greater than, less than or equal to a right angle.
Curated OER
Identify the Angles
In this angle review activity, students examine 4 angles and identify each of them as acute, right, obtuse, or straight angles.
Curated OER
Sorting Angles
In this sorting angles worksheet, students distinguish the differences between right, obtuse and acute angles. Students determine what type of angle thirteen angles are as shown.
Curated OER
Right Angles
In this math worksheet, students compare different shapes while identifying the right angles. They also write down the right angles seen in a classroom.
Curated OER
Right Angles
In this math worksheet, students learn to recognize a right angle. Students study the picture of the right angle and are asked to draw 3 examples. Students then find and draw 9 examples of right angles in objects around them.
Curated OER
Gougu Rule or Pythagoras' Theorem
Fifth graders explore Pythagoras' Theorem. They examine the pattern linking the length of the hypotenuse of a right angled triangle and the length of the other two sides. Students find an unknown side in right angled triangles.
Curated OER
Hey! What Is Your Angle?
Fifth graders create and classify straight, right, acute and obtuse angles. In this clever lesson, 5th graders utilize pretzel sticks to form different types of angles. Best of all, they get to eat them at the end!
Curated OER
Classifying Angles: Greater Than, Less Than, or Equal to 90 Degrees?
In this angles worksheet, students analyze four angles. For each angle, students decide if it is greater, less than, or equal to a right angle. Students check the correct box.
Curated OER
Right Angles
In this right angles instructional activity, students review various images of right angles. Students then find the angles and right angles for the given shapes and write them on the lines.
Curated OER
Right Angles in the Classroom
In this finding right angles activity, learners look around the classroom and draw any right angles they see. Students then "tick" any right angle in 6 geometric shapes.
Curated OER
Math: A Geometric Neighborhood
Pupils, as a final project, draw a picture of their ideal neighborhood on a sunny day. In addition to the sun, their drawings include homes, trees, streets, and selected objects. Each object in their drawing has a written description...
Curated OER
Investigating the Idea of Cos
Fifth graders use cos to solve problems involving right-angled triangles. They solve equations of the form cos(++) = a, for a between -180 and 360 degrees. They state the value of cos(++) in special cases and graph y = cos(++).