Angle Bisector Teacher Resources

Find Angle Bisector lesson plans and worksheets
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Measurement: Distance Relations

For Teachers 9th - 12th Standards
Never miss a centimeter with a set of measurement lessons and activities, focusing on area and perimeter. From practice sheets to collaborative games, your high schoolers will love geometry!
4:03
Lesson Planet

Angle Bisectors: Lesson

For Students 8th - 11th Standards
Apply bisectors and distances to angles. Using the definition of an angle bisector, a portion of a geometry playlist draws a diagram showing the angle bisector. The video details properties of an angle bisector and their converses....
2:42
Lesson Planet

Proportions with Angle Bisectors: Lesson

For Students 8th - 11th Standards
Half at one end becomes proportional on the other. As part of a basic geometry playlist, the video introduces the Angle Bisector Theorem. The presentation uses the theorem to find missing lengths in triangles.
2:06
Lesson Planet

Angle Bisector

For Students 8th - 11th Standards
Cut it in half with a compass and straightedge! Using construction tools, a video shows how to create an angle bisector. The presenter points out what it means to bisect an angle in terms of the measure and distances from the sides of...
Lesson Planet

Angle Bisectors and Medians of Quadrilaterals

For Teachers 9th - 12th Standards
Young scholars investigate the properties of quadrilaterals formed by angle bisectors of a given quadrilateral and quadrilaterals formed by the medians of quadrilaterals. This Cabri Jr. lesson provides opportunity for conjecture and...
Lesson Planet

Constructing an Angle Bisector

For Students 9th - 12th Standards
Demonstrate the angle bisector construction using both teacher-led and student-led guided practice. Scholars learn the process and practice the construction multiple ways. They verify their work with protractors and patty paper.
Lesson Planet

Congruent Angles and Angle Bisectors: Bisecting Pepperoni Pizza

For Students 9th - 12th Standards
Who doesn't like pizza?  A creative lesson uses a piece of pizza to explore angle bisectors and congruent angles. Young scholars work through a simulation to create congruent slices of pizza by analyzing an angle bisector. They then...
EngageNY

Similarity and the Angle Bisector Theorem

For Teachers 9th - 10th Standards
Identifying and verifying reproducible patterns in mathematics is an essential skill. Mathematicians identify the relationship of sides when an angle is bisected in a triangle. Once the pupils determine the relationship, they prove it to...
Lesson Planet

Geometry/Math A Regents Questions: Angle Bisectors

For Teachers 9th - 12th
In this angle bisector worksheet, students solve five short answer and multiple choice problems. Students construct angle bisectors using a compass.
Lesson Planet

Altitude, Median, and Angle Bisector of a Triangle

For Teachers 9th - 12th Standards
Learners investigate the special properties of an altitude, a median, and an angle bisector and explore how these special segments divide the area of a triangle. The dynamic nature of Cabri Jr. allows pupils to form and verify conjectures.
Lesson Planet

Angle Bisectors

For Students 10th
For this angle bisectors worksheet, 10th graders solve and complete 12 different problems. First, they find the value of xand the measure of the indicated angles for each situation. Then, students find the values of each indicated term...
Lesson Planet

Find the Angle

For Teachers 7th - 10th Standards
This a fun problem for young geometers to play with while gaining important insight into deductive reasoning. Some will find the answers very quickly, others might take a less direct path, but all will use their knowledge of the sum of...
Lesson Planet

Exploring Perpendicular and Angle Bisectors

For Teachers 9th - 12th Standards
Can your learners define bisectors of angles? After a little practice they'll have no trouble using their TI calculator to draw and define bisectors of angles. They'll work through a 45 minute activity that requires them to draw a...
Lesson Planet

Angle Bisectors

For Students 10th
In this angle bisector worksheet, 10th graders solve and complete 23 various types of geometry problems. First, they find the angles listed in the figure shown. Then, students determine the sum of the interior angles of a polygon. They...
1 In 1 Collection
EngageNY

Tangent Segments

For Teachers 9th - 12th Standards
What's so special about tangents? Learners first explore how if a circle is tangent to both rays of an angle, then its center is on the angle bisector. They then complete a set of exercises designed to explore further properties and...
Lesson Planet

Isosceles Triangles and Special Line Segments

For Students 9th - 12th Standards
Under which conditions can a triangle be classified as isosceles? High schoolers practice identifying isosceles triangles and special line segments, including angle bisectors, medians of triangles, and perpendicular bisectors of sides of...
EngageNY

Points of Concurrencies

For Teachers 9th - 10th Standards
You say that perpendicular bisectors intersect at a point? I concur! Learners investigate points of concurrencies, specifically, circumcenters and incenters, by constructing perpendicular and angle bisectors of various triangles.
Lesson Planet

Perpendicular and Angle Bisectors

For Teachers 10th
In this geometry worksheet, 10th graders solve problems that are based on the theorems associated with perpendicular and angle bisectors of a triangle.  An application on the coordinate plane is included.  The one page worksheet contains...
Lesson Planet

Construction: Angle Bisector

For Teachers 9th - 12th
In this geometry worksheet, young scholars construct angle bisectors of two provided rays using a straightedge and a compass. There are 6 questions.
Lesson Planet

Angle Bisectors

For Teachers 9th - 12th
Students identify different angles. For this geometry lesson, students identify different properties of triangles. They find the altitude, median and angle bisector.
Lesson Planet

Using Triangle Congruence Theorems-ID: 9692

For Teachers 10th
Tenth graders explore triangle congruence.  In this geometry lesson, 10th graders solve situational problems using their prior knowledge regarding triangle congruence.  Additionally, students explore and conjecture regarding properties...
Lesson Planet

Chapter 5 Final Review Extra Problems. Triangles

For Students 10th - 12th
In this triangles activity, students identify the median, altitude, segment, angle bisector, perpendicular bisector and triangle midsegment of triangles.  They find the perimeter of triangles.  This three-page activity contains 8...
Lesson Planet

Triangles

For Students 10th
In this triangles worksheet, 10th graders solve 3 extensive informal geometry problems that involve triangles. First, they sketch a triangle, selecting 3 of the sides and constructing 3 midpoints. Students then draw each of 3 medians by...
Lesson Planet

Indirectly Direct

For Teachers 4th - 8th
Learners use prior knowledge of angle and lines as they conduct an experiment with a rolling marble to determine the shape of a mystery object located under a metal pie tin.

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Angle Bisector