None
No because the 2 angles do not add up to 90 degrees
No such thing as a four-sided triangle !
a triangle has 0 lines of symmetry.
The internal angles of a triangle add up to 180 degrees so in an equilateral triangel each internal angle must be 60 degrees, as 3 x 60 = 180.
A triangle has 3 vertices and 3 interior angles that add up to 180 degrees
3
None
The three angles of a triangle add to 180 degrees. If two of them add to 140 degrees then the third must be 180 - 140 = 40 degrees.
The answer will depend on which angle is 63 degrees, and the measurement units used for c.
what is 3-D triangel called?
Just one.
Is the triangel kill alot of poeple?
No because the 2 angles do not add up to 90 degrees
no because an equalateral triangel is equal to all sides and an iscoselise trangel has only 2 equal sides.
im not sure i just saw it on youtube but your able to do it im sure of it
three line of symmetry