Geometry, Right angle
28-July-2021 Wednesday
Answer to the post "Rectangle with sides 2m * 3m * 4m"
28-July-2021 Wednesday
Right triangle with sides 2m*3m*4m
11-May-2021 Tuesday
When I suddenly realized that I was growing up in the wrong direction
26-February-2021 Friday
Reply to the post “A seven-year-old’s homework has stumped a doctor of sciences”
05-September-2019 Thursday
Why is a right angle 90 degrees?
13-February-2016 Saturday
correct geometry. Right angle.
12-February-2016 Friday
correct geometry. Right angle.
16-April-2015 Thursday
About directness.
17-August-2014 Sunday
90 degrees
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