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215 resources with the concept right angles

Lesson Planet

Unit 5 Section 2: Measuring Angles

For Students 4th - 6th Standards
An interactive assignment displays two example angles to teach how to measure them. When you click on the angles, a protractor appears! As practice, learners view a set of angles, estimate the size of each, and then enter the degrees in...
Lesson Planet


For Teachers 3rd - 5th
Learners identify obtuse and acute angles in comparsion to a right angle. They identify obtuse, acute, and right angles. Pupils use "Shape Measure" to construct obtuse, acute, and right angles. They review line segements to locate right...
Lesson Planet

Lines, Line Segments, Rays, and Angles - Practice 15.1

For Students 3rd - 5th Standards
Is it a line, line segment, ray, or angle? Identifying geometric figures is the focus. In addition to identification, learners recognize right angles or tell if an angle is less than or greater than a right angle. They tell if lines are...
Lesson Planet

Measuring Angles - Pretest Questions

For Students 4th - 6th
Upper graders solve ten multiple choice problems about angles and measuring angles.
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Rays and Angles - Homework 16.2

For Students 3rd - 5th
Learners name seven different angles in three different ways and then classify each angle as acute, obtuse, right or straight. They solve one word problem.
Lesson Planet

Year 5 Unit 2b

For Teachers 4th - 5th
This slide-show is packed with information relating to a variety of mathematical concepts. Intended as an accompaniment to a full unit, this resource provides definitions, explanations, and opportunities for learners to practice their...
Lesson Planet

Measure Angles - Practice 16.3

For Students 4th - 6th
Upper elementary learners use a protractor to draw angles having given measures, then classify angles. Houghton Mifflin text is referenced.
Lesson Planet

Measure Angles - Homework 16.3

For Students 4th - 6th Standards
Very simply, geometers draw six angles with the stated angular measure. A protractor is required, so if you assign this as homework, make sure to let learners know that they will need to take a protractor with them. A critical thinking...
Lesson Planet

Angles, Angles, and More Angles

For Teachers 4th - 6th
Upper graders play a game where they take turns drawing an angle and estimating its measurement in order to apply their understanding of various angles. Player 1 draws an angle using a straight edge, their partner estimates the degrees...
Lesson Planet

Identify and Label Different Types of Angles

For Teachers 3rd - 4th
Learners identify and label acute, obtuse, and right angles within a picture. Using Kid Pix software and digital photos, they manipulate, identify, and label the angles and describe the angles to a classmate.
Lesson Planet

"Polly"gon Pockets

For Teachers 3rd - 5th Standards
Explore polygons with your elementary learners. Divide the class in 12 to configure the polygon puzzle before them. They list the attributes of each type of polygon they see, and if there's time, they jump on the interactive website...
Lesson Planet

Revise Properties of 3-D Shapes

For Students 5th - 6th
For this properties of 3-D shapes worksheet, students identify shape, faces, edges, vertices, and right angles. In this fill in the blank worksheet, students answer thirty-six problems.
Lesson Planet

Angles - Identify What Type

For Students 3rd - 5th
In this geometry worksheet, students read the definitions of right, acute, and obtuse angles in a box at the top of the page. They label 6 angles and use a protractor to measure 3 pairs of angles. They tell whether the angles are...
Lesson Planet

The Thorndale Street Art Fair

For Students 7th
In this polygons worksheet, 7th graders solve and complete 7 different problems that include renting space for artists at a street fair. First, they determine the space that would cost the most amount of money to rent according to the...
Lesson Planet

Types of Angle

For Students 4th - 12th Standards
Angle in on the different types of angles. By watching an informative video, scholars see how to classify angles. It covers acute, right, obtuse, straight, and reflex angles. Some example problems focus on classifying angles given their...
Lesson Planet

Angles: Right Angle

For Students 6th - 12th Standards
The right measure is often hard to find. Given a diagram of two angles that make up a right angle and one of their measures, scholars learn how to find the other angle measure. They watch a video that explains the process and covers a...
Lesson Planet

Estimating Angles

For Students 4th - 12th Standards
Sometimes, exact measurements aren't necessary. Scholars learn to estimate the measure of angles by watching a useful video. The method employed here is to use 90-, 180-, and 270-degree angles as benchmarks, adding or subtracting as...
Lesson Planet

Introduction to Angles Using Degrees

For Students 6th - 10th
What's your angle? Individuals learn how angles are measured by watching a video in the Socratica Geometry series. The video explains acute, right, obtuse, and straight angles.
Lesson Planet

Angles Template

For Students 4th - 6th Standards
Young mathematicians learn to see geometry from different angles with this simple printable resource. Providing multiple visual examples of angles, this simple document can be used as an instructional tool, a skills practice exercise, or...
Lesson Planet

Tangent to a Circle From a Point

For Teachers 9th - 10th Standards
Learners see application of construction techniques in a short but sophisticated problem. Combining the properties of inscribed triangles with tangent lines and radii makes a nice bridge between units, a way of using information about...
Lesson Planet

Solving Right Triangles

For Students 7th - 10th
Solve that triangle! Your class examines angles and side measurements on 20 right triangles to determine the missing measurements. For some, they are given two sides while for others, they are given an angle and a side.
Lesson Planet

How Do You Find the Tangent of an Angle in a Right Triangle?

For Teachers 6th - 11th
What's a trigonometric ratio? It is a ratio between two sides of a right triangle. In this problem, find tangent(A) in the given right triangle. Use the ratio of the opposite side divided by the adjacent side to find tan(A). The...
Lesson Planet

How Do You Find the Volume of a Cone?

For Teachers 6th - 10th
The formula to find the volume of a cone is volume equals one-third times the base times the height. The base can be found by using the formula to find the area of a circle: base equals pi times radius squared. So it seems that the area...
Lesson Planet

How Do You Find the Slant Height of a Cone?

For Teachers 9th - 10th
Use the Pythagorean theorem formula to find the slant height of a cone. If the height of the cone and the radius of the base are given, using the Pythagorean theorem formula will be a piece of cake. Just plug in the values given and solve.