How do you make an Equilateral Triangle with rounded corners?

Hi all
i was trying to create the triangle the way “Syziph” did it
but i have a problem on step 2
“2. Extrude all 3 sides away.”

how can i extrude all faces in the triangle equally

when i try to extrude
the right and left extruded edges are more far away from the triangle
and the bottom extruded edge i look more closer

on bottom face i extrude and move the edge for 0.2 at Z axis
for the right face i extrude and move the edge 0.2 for the Z axis and 0.2 for the X axis

its look weird
can someone help me how to extrude the edges equally

thank u

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