Parallel and perpendicular: 3rd grade math lesson

What this lesson shows

Lines that never meet, and lines that meet at a square corner, tested with a paper corner.

The worked example

The lesson works this one step by step: line BC parallel to line DE, line FG perpendicular to line HJ. Then your kid tries one like it on paper.

The steps

Parallel: never meet
Same distance apart
Perpendicular: a square corner
Test with a paper corner

Helping at home

Draw parallel lines the same distance apart all along, like railroad tracks. Draw perpendicular lines so they meet at a square corner, and test it with the corner of a sheet of paper. Mark a square corner with a little square.

If your kid gets stuck

Test each corner with a paper corner.

Watch it with Lux

With Lux, this lesson is a narrated video and a printed page your kid works on. Then Lux helps with the same math on their own worksheet, one question at a time.

See how Lux works

Standards

Common Core 4.G.A.1
Draw points, lines, line segments, rays, angles (right, acute, obtuse), and perpendicular and parallel lines. Identify these in two-dimensional figures.

Matches standards in 50 statesSee each state's code

Alabama MA19.4.27
Alaska 4.G.1
Arizona 4.G.A.1
Arkansas 3.GM.2, 4.GM.4
California 4.G.A.1
Colorado 4.G.A.1
Connecticut 4.G.A.1
Delaware 4.G.A.1
District of Columbia 4.G.A.1
Florida MA.3.GR.1.1
Georgia 3.GSR.6.1, 4.GSR.7.1, 4.GSR.8.1
Hawaii 4.G.A.1
Idaho 4.G.A.1
Illinois 4.G.A.1
Indiana 3.G.2
Iowa 4.G.A.1
Kansas 4.G.1
Kentucky KY.4.G.1
Louisiana 4.G.A.1
Maine 4.G.A.1
Maryland 4.GR.C.8
Massachusetts 4.G.A.1
Michigan 4.G.A.1
Minnesota 3.3.1.1, 4.3.2.2
Mississippi 4.G.1
Missouri 4.GM.A.1
Montana MT.4.G.1, 4.D2.2, 4.D4.2
Nebraska 1.G.1.c, 4.G.1.a, 4.G.1.b
Nevada 4.G.A.1
New Hampshire 4.G.A.1
New Jersey 4.G.A.1
New Mexico 4.G.A.1
New York NY-4.G.1
North Carolina NC.4.G.1
North Dakota 3.GM.G.1, 4.GM.G.1
Ohio 4.G.1
Oklahoma 2.GM.1.5, 3.GM.1.3, 4.GM.1.1
Oregon 4.GM.A.1
Pennsylvania CC.2.3.4.A.1
Rhode Island 4.G.A.1
South Carolina 3.MGSR.3.1, 3.MGSR.3.2
South Dakota 4.G.A.1
Tennessee 4.G.A.1
Texas 111.6.b.6.A
Utah 4.G.1
Vermont 4.G.A.1
Virginia 1.MG.2e, 4.MG.4a, 4.MG.4b, 4.MG.4c, 4.MG.4d, 4.MG.4e, 4.MG.5b, 4.MG.5f, 5.MG.3a
Washington 4.G.A.1
West Virginia M.4.26
Wisconsin M.4.G.A.1

Parallel and perpendicular