GR.9.4

Deduce whether a triangle is right-angled

Name: Proof: Area formulas for Rectangle, Parallelogram, Triangle and Trapezoid
Uploaded: 2013-02-09
Duration: 4 min 11 s
Channel: Boring Math Tutor
Description: Uses the converse of Pythagoras to test whether a triangle is right-angled from its three sides.

Deduce whether a triangle is right-angled by considering its sides

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Grade 4–6 Core 🇺🇸 US

Proof: Area formulas for Rectangle, Parallelogram, Triangle and Trapezoid

Boring Math Tutor 7K views

Uses the converse of Pythagoras to test whether a triangle is right-angled from its three sides.