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### We found 89 resources with the concept perpendicular bisectors

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(89)

Lesson Planet

#### EngageNY Geometry Module 1: Congruence, Proof, and Constructions

The 36 lessons in the Geometry Module 1 collection address transformations in teaching geometry brought on by Common Core. The focus here is on transformations and the relationships between transformations and congruence. Teacher...

Lesson Planet

#### Finding a Location for Your Kitchen Island

Where is the best place to work? Small groups map out a kitchen on a coordinate plane and find the centers of the work triangle to find the best place to install an island. The teams use algebraic methods to locate the center by finding...

Lesson Planet

#### Loci and Constructions

A General Certificate of Secondary Education math review has class members make basic constructions. Using a protractor and a ruler along with a compass, pupils develop drawings of triangles with given measurements. Scholars use their...

Lesson Planet

#### Loci Part 1

Where can it go? The first video on loci develops a definition and provides some quick sketches of the loci of all points with given characteristics. The presenter does an example of the loci of points a given distance from an L shape.

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#### Loci Part 2

Closer to this point and farther from that one. Continuing with loci problems, a short video shows how to work problems that are not straightforward. The presenter works loci problems that result in a region that meets several criteria.

Lesson Planet

#### Construct a 45 Degree Angle

Create a 45-degree angle without bisecting an angle. A video shows a method to construct a 45-degree angle without needing to bisect a right angle. By constructing an isosceles right triangle, the presenter constructs a 45-degree angle...

Lesson Planet

#### Perpendicular Through a Point on a Line

Use one construction to complete a second. The short video shows how to incorporate the steps of a perpendicular bisector to create a perpendicular to a point on a line. With their own straightedges and compasses, classmates then...

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#### Perpendicular Bisector

Where should the statue be located? The resource explains how to use a compass and straight-edge to construct the perpendicular bisector of a line segment. Using an exam question, the narrator models how to solve an application problem...

Lesson Planet

#### Module 3: Geometric Figures

It's just not enough to know that something is true. Part of a MVP Geometry unit teaches young mathematicians how to write flow proofs and two-column proofs for conjectures involving lines, angles, and triangles.

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#### In Oz We Tryst

The shortest distance from point A to point B is a straight line, but measuring distance gets more complicated when there are three points! Given the location of three friends, individuals determine the best point for all three friends...

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#### Perpendicular Bisectors: Lesson

Get right up and split it in half. Using a diagram, the video provides the definition of a perpendicular bisector. The portion in a playlist on basic geometry explains perpendicular bisector of a segment and of triangle sides properties.

Lesson Planet

#### Isosceles Triangles: Lesson

Two sides give us two angles. A segment of a playlist on basic geometry revisits isosceles triangles. The presentation explains several properties and theorems related to isosceles triangles.

Lesson Planet

#### Fundamental Property of Reflections

What do midpoints and perpendicular bisectors have to do with reflections? Learners first reflect line segments over the x- and y-axes. Using the results, they see how the line of reflection is a perpendicular bisector for segments...

Lesson Planet

#### Determination of the Optimal Point

Meet at the Fermat-Torricelli point. Individuals determine the optimal location of a facility given criteria. This means they must consider points of concurrency in a triangle, including the centroid, the incenter, the circumcenter, the...

Lesson Planet

#### Circumnavigating the Circumcenter

Explore the relationship between the circumcenter and vertices of a triangle. A construction activity asks learners to construct perpendicular bisectors of three different triangles to locate the circumcenter. Through analysis, scholars...

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#### Back to the Basics: Constructions

Create a constructionist approach to constructions. The lesson introduces the concept and tools of constructions. Pupils use worksheets to find a method that will perform the given constructions. The teacher guides the groups and...

Lesson Planet

#### Bisecting Angles and Line Segments

Divide figures in two using basic construction tools. A lesson introduces the steps to conduct two basic constructions. Using a straightedge and a compass, pupils bisect angles and create the perpendicular bisector of a line segment....

Lesson Planet

#### Name That Triangle

Given a line segment and its perpendicular bisector, pupils visualize a triangle with the endpoints and a point on the perpendicular as its vertices. Learners determine the type of triangle formed and provide a justification for the...

Lesson Planet

#### Bisectors of Line Segments and Angles: Cut a Line

Geometric constructions build relationships —by simply manipulating simple tools. An interactive lesson presents a completed construction of a segment bisector and has learners analyze the important aspects. Ultimately, they should be...

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#### Justifying SSS Congruence

Are congruent corresponding sides of two triangles enough to show congruence? The short assessment provides two triangles with the information that the three sets of corresponding sides are congruent. Pupils develop a proof showing that...

Lesson Planet

#### Construct the Center of a Circle

Meet your class in the middle using a well-rounded formative check! Geometry scholars use a compass and straight edge to construct the center of a circle. High schoolers justify the steps they took to perform the construction through...

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#### Equidistant Points

What's so special about perpendicular bisectors? Pupils investigate points on the perpendicular bisector of a line segment. They write a proof for why a point on the perpendicular bisector is equidistant from the endpoints of the line...

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#### Define a Reflection

Develop a definition based upon the performance. Using a line and a point, pupils reflect the point across the line. The learners use the steps in creating the reflection to develop a precise definition of a reflection.

Lesson Planet

#### Circumscribed Circle Construction

Can you find a circle in a triangle? An assessment provides a triangle and asks the learners to construct a circumscribed circle. Pupils find the center of the circle and name the point of concurrency used as the center.