South Carolina ETV

South Carolina ETV
1101 George Rogers Boulevard
Columbia, SC 29201-4761
Phone: 803-737-3545

Angles: Angles, Angles, Everywhere (Grades 6-8)

MASTER TEACHER

Yvette Barnes

OVERVIEW

This lesson is designed to help students visualize, estimate, and measure angles. Through the use of video, students become aware of angles in a variety of objects and situations. Hands on activities and student interaction are incorporated to assist with exploring, discovering, and measuring angles in a variety of objects and situations.

ITV SERIES

Math Vantage, Lesson 7: What's Your Angle?

OBJECTIVES

Students will be able to estimate and accurately measure the size of angles communicate with the appropriate geometric terms and symbols to describe and name angles, lines, line segments, rays

SC MATH/SCIENCE STANDARDS

Geometry and Spatial Sense/Middle Grades

Model, identify, describe, and compare two and three-dimensional geometric figures
Represent and apply geometric properties and relationships to solve real-world and mathematical problems and connect geometry and spatial sense to the physical world, to other aspects of mathematics, and to other disciplines

Measurement

Extend their understanding of the concepts of length, capacity, weight (mass), perimeter, area, volume, time, temperature, and angle measure
Select and use appropriate tools and units to measure to the degree of accuracy required in a particular situation

SCIENCE

Area III: Matter and Energy Strand 3/Middle Grades Forces produce physical and chemical changes and in these changes, matter and energy are conserved.

Describe and measure quantities such as time, distance, displacement, mass, force, friction, velocity, acceleration, momentum, potential energy, and Kinetic energy that characterize change in position or motion of objects.

MATERIALS

protractor for each student
ruler for each student
unlined paper (several sheets per student)
paper strips or straws (several per student)
Activity Sheets 1-6 (1 set per student; print below)

PRE-VIEWING ACTIVITIES

Today we will be visualizing, estimating, and measuring angles.

The teacher will demonstrate how to measure angles using a protractor. The teacher will also identify different types of angles.

FOCUS FOR VIEWING

The videotape shows many angles in various situations. Body movements and folding are used to review key terms for angles, rays, line segments and lines. Students will be given practice in naming angles and measuring angles from actual situations.

Ask the students to watch the video for examples of angles in a variety of things and situations. The students should be able to define acute, right, obtuse, straight, and reflex angles.

VIEWING ACTIVITIES

Start the video at the beginning of Lesson 7: What's Your Angle?

Pause the video after she says, "These angles, if you look carefully can be found everywhere." Discuss line, ray, angles, and places angles can be found. Resume.

Pause the video after she waves. Discuss places angles were found in nature. Resume.

Pause the video after the clock strikes twelve. Discuss the different types of angles: acute, right, obtuse, straight, and reflex. The teacher should illustrate each angle on the board. Resume.

Pause the video after she says, "Measure angles between stars and horizon." Discuss the unit used in measuring angles and the instruments used to measure angles. Resume.

Pause the video after she says, "to evaluate the result." Discuss how an orthodontist uses angles and what instruments are used. Resume.

Pause the video after the gymnast rolls to the floor. This comes after she says, "Some people can move their bodies the most amazing ways. Discuss the instrument used to measure the human body's range of motion and the different angles the gymnast demonstrated. Resume.

Stop the tape after the karate demonstration when he is enclosed in the circle with the angles formed. Discuss why angles are important to karate and name the angles that are used.

SUMMARY OF THE VIDEO

The videotape shows many angles in various situations. Body movements and folding are used to review key terms for angles, rays, fine segments and lines. Students will be given practice in naming angles and measuring angles from actual situations.

POST VIEWING ACTIVITIES

Ask students to look for examples of the various angles from the video around the room.

Give students paper, protractors, and rulers, and dictate the following directions:Draw a house that has one acute angle and one obtuse angle

Draw a skateboard with four straight angles

Draw a toy with no right angles

Let the students show their art work to the class.

Let the students complete Activity Sheets 1-4.

Have students create angles with paper strips and fasteners or straws and metal twists. Students then exchange the angles with other students who estimate the angle measures and describe the angles as acute, right, obtuse, straight or reflex.

ACTION PLAN

Ask each student to research a sport and identify the types of angles used in that sport.

Invite an orthodontist to speak to the class about the types of angles he/she uses on the job.

Take a walk on a nature trail, visit the zoo or the fair and identify angles in various things.

EXTENSIONS

Science. To determine how distance can be compared using an astrolabe, students should work in pairs to complete Activity Sheet 5: Using An Astrolabe.