SME
Grade 8 Math · Problem type
Is it a right triangle?
Use this for “Which of these could be the sides of a right triangle?” with the converse of the Pythagorean theorem.
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Is the triangle a right triangle?
Tap a card, then tap its group.
Assumptions
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Square the two shorter sides and add them. Square the longest side.
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If the two results are equal, the triangle has a right angle (the converse).
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A root squared is the number under it: (√13)² = 13.
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Related lessons
Pythagorean theorem and distance between points
Main lesson
Distance between two points
Use this for “Find the distance between (−9, −12) and (0, 0)” or “How long is the segment on the grid?”
A diagonal through a box
Use this for “Will a 30 cm umbrella fit flat in a 20 cm by 15 cm by 18 cm box, corner to corner?”