The longest side is always opposite the right angle so the sides of the right angle are 3 and 4 units.
It is a right angle triangle
Providing that it is a regular polygon it will have 8 sides.
No because a quadrilateral has 4 sides whereas a triangle has 3 sides.
Well, honey, that's a right triangle. It's like a regular triangle, but with a sassy little right angle thrown in there to keep things interesting. So, if you're looking for a shape that's all about that right angle life, you've found it.
Angle
A triangle.
A right angle triangle.
3 : 4 : 5
An equilateral triangle has 3 equal sides, and each angle is 60 degrees.
A triangle has 3 sides and 3 inside angle that add up to 180 degrees
Equilateral