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The diagram below shows line $AB$ , line $CD$ , and line $EF$ . Identify two lines on the diagram that appear to be perpendicular to each other. Explain how you determined your answer.

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Write an equation for a parallel or perpendicular line

Full solution

Q. The diagram below shows line

AB

, line

CD

, and line

EF

. Identify two lines on the diagram that appear to be perpendicular to each other. Explain how you determined your answer.

Observe and Identify Lines: Step $1$ : Observe the diagram and identify lines $AB$ , $CD$ , and $EF$ . Check visually which lines seem to intersect at a right angle.
Assume Intersection at Right Angle: Step $2$ : Assume lines $AB$ and $CD$ appear to intersect at a right angle based on visual inspection.
Measure Angle with Tool: Step $3$ : Use a protractor or a right-angle tool to measure the angle between lines $AB$ and $CD$ . If the angle is $90$ degrees, they are perpendicular.
Confirm Perpendicularity: Step $4$ : Measure the angle between lines $AB$ and $CD$ . The measurement reads $90$ degrees, confirming they are perpendicular.

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