# bug or not?

leeying shared this problem 3 months ago
Not a Problem

The sum of inner angle of the quadrangle should be 360 degrees. But in the following example their units are changed from degree to real number.

Is it right?

Anyhow I don't think it right. Even if to use real number to express the sum, it should be 2π, not 6.28. The latter one is not accurate.

Files: 001.ggb
Best Answer

This is not a bug: Cas works in radians.

You can force output in degrees for inverse trigonometric functions.

Please use Algebra View for basic calculations like the one you're doing. CAS is meant to be used for symbolic and advanced calculations.

## Comments (2)

1

This is not a bug: Cas works in radians.

You can force output in degrees for inverse trigonometric functions.

Please use Algebra View for basic calculations like the one you're doing. CAS is meant to be used for symbolic and advanced calculations.

1

I see. Thank you.

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