Question

Can a triangle be formed with the side lengths of 8cm 4cm and 12cm?

Answer 1

I'd suggest posting this in math next time! But, No. The sum of the measures shorter legnths of the sides must be greater than the measure of the greatest angle.

Answer 2

use a^2+b^2=c^2

8^2+4^2 12^2

64+8 144

=72

72<144

so no