Proof of Heron's formula

https://www.cuemath.com/measurement/area-of-triangle-with-3-sides/#

Regards,

Mr Chang C.L.

_________________

http://MrChang.com/

math ideas… Kaprekar's Constant 6147

https://brilliant.org/wiki/kaprekars-constant/

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p5 fraction H:models (fr clara q)

my solution 

https://www.instagram.com/p/C-YCkNzSAwD/?igsh=Y3poZmV2cDJraWw3

p6 percentage

https://www.instagram.com/p/C-PIXWjRh2I/?igsh=MXdpcnBhdzRrZDd5NQ==

p6 fractional, conditional. H: model, u&p, algebra)

my solution 

Special angles through Origami

Check this Board out on Pinterest!
https://pin.it/23bC7HAjO

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Interesting geometry problems

Chang Cheng Liang on Instagram instagram.com

Chang Cheng Liang on Instagram instagram.com

Chang Cheng Liang on Instagram instagram.com

P6 circles, speed (fr: Jntt)

my solution 

my solution

P6 fraction, percentage, geometry, circles (fr Abi)

my solution

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my solution

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my solution
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my solution 

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P6 numbers H: substitution , algebra (fr Yan Cheng)

https://www.instagram.com/p/C7ePf2_RX2T/?igsh=N3NoOW0za293Mnhn

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P6 geometry (fr Lucas Ch)

P5 numbers model (fr Jaylen T)

https://www.instagram.com/p/C7Qgk9GRVtb/?igsh=YXU5Z3gza3hxMmY=

https://www.instagram.com/p/C7QgfgWRMBE/?igsh=MTM0eXI4eTdsb3R0ZQ==

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p6 fractions TFNPT (fr Lucas Ch)

p6 circles (fr kelly)

My solution

Sec1 Geometry (Fr: YZY)

Chang Cheng Liang on Instagram: "Sec1 Geometry" instagram.com

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P4 P5 Numbers (fr Clare Q)

https://www.instagram.com/p/C5a27LPxqeZ/?igsh=MTF3eW5qZG5tb3lucg==

P5 numbers (fr jaylen)

https://www.instagram.com/p/C5QrSssxzxa/?igsh=MW95c2ZqeDZhMTd6bg==

P5 fraction (fr jaylen)

https://www.instagram.com/p/C5Qq-J0x-2l/?igsh=enVjY2VhaWxhMDdh

p5 numbers (fr jaylen)

https://www.instagram.com/p/C5QoL5sx8Xx/?igsh=MTc1ZHNiZ3VheW4xNA==

P6 Circles (fr LS)

https://www.instagram.com/p/C4f-1Bpx3yC/?igsh=MW05ZGxyeTA1dmxvNA==

sec1 linear equation (algebra) (fr ZY)

Critical Thinking Skills Quiz

https://www.criticalthinking.com/critical-thinking-quiz

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p4 p5 p6 geometry

Look at this... 👀

Found this on Pinterest pin.it

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Geometry—- measuring angles

Look at this... 👀
https://pin.it/1qeyiewpx

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Protractor for standard angles by paper folding 👏👍😄

Look at this... 👀

https://pin.it/5qTMJ5AL9

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