Nothing happens on the screen after I finish coding and press the buttons

[2F27_TSANG_CHUNG_YU]

[dora_paz]

See how to test your app

Set up App Inventor to test your app
and

FAQ Section: Companion and Emulator

Introductory Your First App Testing - MIT Breaking News: Dec 1 2023 nb195b needs Companion 2.69 or 2.69u side load Sep 4 2023 nb194b needs Companion 2.68 or 2.68u side load June 19 2023 nb193 needs Companion 2.67 or 2.67u side load Feb 17 2023 nb191 needs Companion 2.66 or 2.66u side load Sep 22 2022 nb190 needs Companion 2.65 or 2.65u side load Sep 2022 open beta emulator June 2022 - Companion 2.63 PlayStore rollout hiccup - ewpatton March 2022 - Please test Companion under https - Ha…

[ChrisWard]

Hello Tsang Chung Yu

You might like to improve your GUI:

1. One button for all values per Shape
2. Labels for results instead of Notifier
3. Display an image of the Shape

Set Pi as a Global variable. Use Procedures for your equations.

See my website for example 2d geometry functions:
https://www.professorcad.co.uk/appinventorsnippets#MathGeometry

[ChrisWard]

Hello Tsang Chung Yu

Were you able to test your App?