In a triangle, if you draw 6 cevians that end up trisecting all of the triangle's sides, you get this. How can we formally prove this true? Source: @gogeometry. geogebra.org/m/qhabmchn @geogebra #MTBoS #ITeachMath #geometry #math #maths #proof #MathChat

The 3 medians of any triangle split it up into 6 smaller triangles with equal areas. Quick S prompt: geogebra.org/m/k6Vd2RsX @geogebra #MTBoS #ITeachMath #math #maths #geometry #EdTech #MathEd

Interesting phenomenon that occurs in a square. How can we prove what is dynamically illustrated here? 🤔 (Source: @gogeometry) geogebra.org/m/HWc2dVtF @geogebra #MTBoS #ITeachMath #geometry #math #maths #mathematics #proof

Trapezoid median (and triangle midsegment) action: Dynamic & modifiable illustration without words or numbers. geogebra.org/m/bztqfhpr @geogebra #MTBoS #ITeachMath #math #maths #geometry #MathEd #MathEdTech #geometry #MSMathChat #HSMathChat #MathChat #MathEd #EdTech

Interesting phenomenon that occurs when we construct the 4 angle bisectors of any quadrilateral. Why are these 4 points concyclic? 🤔 When are 2 (or more) points concurrent? geogebra.org/m/prspvPVS @geogebra #MTBoS #ITeachMath #math #maths #geometry #proof #MathEd #MathEdTech

60 Degree Sector Surprise! Easy to see. How easy to prove? 🤔 geogebra.org/m/VUfAEgHq. Source: @gogeometry. @geogebra #MTBoS #ITeachMath #geometry #math #maths #MathChat #HSMath #CollegeMath #proof #MathEd #MathEdTech

Area of a Triangle: Quick modifiable illustrator & conceptual reminder. geogebra.org/m/dzxHUvnH @geogebra #MTBoS #ITeachMath #math #maths #geometry #MSMathChat #ElemMathChat #GeomChat #EdTech #MathChat #mathematics #proof #MathEd

Which trig identity is dynamically being illustrated here? 🤔 geogebra.org/m/xmhyyapn @geogebra #MTBoS #ITeachMath #math #maths #geometry #trigonometry #GeomChat #PreCalculus #PreCalcChat #HSMathChat #HSMath #MathChat #EdTech #ProofWithoutWords #CollegeMath

1 Quadrilateral + 4 Exterior Angle Bisectors = 😮? Why are the 4 points (at the end) always concyclic? Source: @gogeometry. geogebra.org/m/f7bhF78u @geogebra #MTBoS #ITeachMath #math #maths #geometry #HSMathChat #CollegeMath #MathChat #GeomChat #proof

Triangle incenter & incircle: Quick dynamic & modifiable illustrator. geogebra.org/m/N5xVEu5n. @geogebra #MTBoS #ITeachMath #math #maths #geometry #EdTech #MathEd #MathEdTech

1 triangle + 2 parallel lines + 4 circumcenters = 😮? How to prove? Source: @gogeometry. geogebra.org/m/DbPFtyXA @geogebra #MTBoS #ITeachMath #math #maths #EdTech #geometry #proof #MathEdTech #FigureThat #ProofWithoutWords #HSMath #CollegeMath

Composition of 2 line reflections in @geogebra #geometry app: Interactive exploration. What can we conclude here? geogebra.org/m/schvdg2p. #MTBoS #ITeachMath #math #maths #proof #MathEd #MSMathChat #HSMathChat #EdTech #MathEdTech

Polygon Exterior Angles (version 2): #Triangle (n = 3) through Hexagon (n = 6). @geogebra resource inc's Qs for Ss. geogebra.org/m/fuVF2C9n. BGM: @DJKennethA. #ITeachMath #EdTech #geometry #MSMath #HSMath @ATOMICMath @ATMIM_Updates @ATMNEmath #MathEdTech

Happy π Day! geogebra.org/m/Qz9CuJT8 @geogebra #MTBoS #ITeachMath #math #maths #MathEd #geometry #EdTech #HappyPiDay

TRIG ID: Dynamic area illustration. Which one? 🤔 Made with @geogebra: geogebra.org/m/rcqnknsr. #MTBoS #ITeachMath #math #maths #geometry #algebra #trig #trigonometry #EdTech #MathEdTech #MathEd #proof

1 Parallelogram + 4 Equilateral Triangles = 😮? How to prove? Source: @gogeometry. geogebra.org/m/wgJ92f8p. @geogebra #MTBoS #ITeachMath #geometry #math #maths #EdTech #MathEd #proof #algebra #HSMath #CollegeMath

Happy New Year! Enjoy this revamped inscribed angle theorems illustrator made with @Desmos GC: desmos.com/calculator/15hlhy… @madewithDesmos @AlgebraDesmos @desmosbank #MTBoS #ITeachMath #math #maths #geometry #proof #EdTech #mathematics #MathEd #MathEdTech #Desmos #DesmosFun

Here's a @Desmos URL that works, as link contained in original tweet doesn't seem to work -- sorry about that: desmos.com/calculator/xajzlx… @AlgebraDesmos @madewithDesmos #MTBoS #ITeachMath

Angle Formed by 2 Chords: Dynamic exploratory illustrator without words or no's. Created with @Desmos GC: desmos.com/calculator/gjjqwv…. @AlgebraDesmos @madewithDesmos @desmosbank #MTBoS #ITeachMath #EdTech #geometry #proof #math #maths #MathEd #MathEdTech #FunWithDesmos

Here, a really cool parallelogram phenomenon not often seen. How to prove? 🤔Source: @gogeometry. geogebra.org/m/MF8xsQf5 @geogebra #MTBoS #ITeachMath #geometry #proof #math #maths #EdTech #HSMath #CollegeMath #MathEd