Draw a front line in the pressure distribution map, how to judge which is a warm front and which is a cold front? thank you

1, the cold front is triangular and pointed, and the warm front is semicircular.

2. Blowing from high latitude to low latitude is a cold front, and blowing from low latitude to high latitude is a warm front.

3. In the low pressure weather system, the trough is cold on the left and warm on the right, but the wind direction is different. The cold front in the southern hemisphere is south and the warm wind is north. The northern hemisphere is the opposite.

4, high pressure weather system generally does not form a front.

5. The air pressure of the cold front is generally higher, while the air pressure of the warm front is lower.