Identifying Angles and Lines

Students will apply their knowledge of geometric attributes by identifying acute, obtuse, and right angles and parallel, intersecting, and perpendicular lines in historic photographs. Students will extend their understanding that the world is built out of geometric figures.

Weblink address (URL):

Home Page- source

Standards & Objectives

Learning objectives:

Given photographs, students will collaboratively identify angles and lines in the photographs.
Using a projector, student groups will describe their photographs in terms of lines and angles and receive peer feedback.
Given a photograph, students will correctly identify at least one example of each type of angle and line set independently by the end of class: “I can identify lines and angles in a historical photograph by the end of class today.”

Essential and guiding questions:

How is our world built out of lines and angles?

Lesson Variations

Blooms taxonomy level:

Understanding

Extension suggestions:

Unused images can be used during math centers as an extended learning opportunity.
Send students on a scavenger hunt in the room, in the cafeteria, or in the playground, looking for lines and angles in their immediate context.
In class or collaboration with the art teacher, prompt students to draw pictures that include angles and lines.
Invite students to bring pictures, books with pictures, or photographs from home to share that include angles and lines.
Assign students a homework task to identify angles or lines at home or at their afterschool programs and to journal about their findings to share the next day.
Challenge students to make self-portraits using only angles and lines. Then, have students “write to talk” about why they chose the angles and lines that they did to exhibit their different features.

Helpful Hints

MATERIALS:

Printed photograph resources (model image and either 1 image per group or enough copies of each image so that each group member has a copy of the same photograph)
Highlighters or color dry erase markers if photographs are laminated (class set)
Assessment document (class set)