Inverse proposition: If two triangles are similar triangles, then these two triangles are congruent triangles false.
No proposition: If two triangles are not congruent triangles, then these two triangles are not fake by similar triangles.
Negative proposition: If two triangles are not similar triangles, then these two triangles are not congruent triangles truth.
If the last digit of a natural number is zero, then this natural number can be divisible by 5.
Inverse proposition: If a natural number is divisible by 5, then the last digit of this natural number is null and false.
There is no proposition: if the last digit of a natural number is not zero, then this natural number cannot be divisible by 5.
Negative proposition: If a natural number is not divisible by 5, then the last digit of this natural number is not zero.
three
Some triangles have three unequal sides.
The diagonal of the diamond is not vertical.
There is no real number x, so the x power of 3 is less than 0.