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89 resources with the concept perpendicular bisectors

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Other Resource Types (89)
36 Items in Unit Module
Lesson Planet

EngageNY Geometry Module 1: Congruence, Proof, and Constructions

For Teachers 9th - 12th Standards
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...
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Finding a Location for Your Kitchen Island

For Teachers 9th - 12th Standards
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

For Students 8th - 11th Standards
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...
7:24
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Loci Part 1

For Students 6th - 12th
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.
7:19
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Loci Part 2

For Students 8th - 11th
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.
2:01
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Construct a 45 Degree Angle

For Students 8th - 11th Standards
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...
1:54
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Perpendicular Through a Point on a Line

For Students 8th - 11th Standards
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...
6:35
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Perpendicular Bisector

For Students 8th - 11th Standards
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

For Teachers 9th - 12th Standards
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

For Students 9th - 11th Standards
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...
3:07
Lesson Planet

Perpendicular Bisectors: Lesson

For Students 8th - 11th Standards
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.
3:02
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Isosceles Triangles: Lesson

For Students 8th - 11th Standards
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.
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Fundamental Property of Reflections

For Teachers 9th - 10th Standards
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...
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Determination of the Optimal Point

For Teachers 9th - 12th Standards
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...
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Circumnavigating the Circumcenter

For Students 9th - 12th Standards
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

For Teachers 9th - 12th Standards
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

For Teachers 9th - 12th Standards
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....
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Name That Triangle

For Students 9th - 12th Standards
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...
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Bisectors of Line Segments and Angles: Cut a Line

For Students 9th - 12th
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

For Students 9th - 12th Standards
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...
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Construct the Center of a Circle

For Students 9th - 12th Standards
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

For Students 9th - 12th Standards
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

For Students 9th - 12th Standards
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.
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Circumscribed Circle Construction

For Students 9th - 12th Standards
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.