Yes because they comply with Pythagoras' theorem
no
There is only one set of perpendicular lines in a right triangle; the horizontal line and the vertical line that make it 90 degrees.
I can't say for sure, since you haven't given me any sets of numbers to choose from, but this question is designed to test your knowledge of the Pythagorean Theorem. Multiply the smaller two numbers by themselves and add them together. If their sum does not equal the square of the largest number, that group cannot be a right triangle.
how many sets of parallel lines are in a triangle
In geometry sets, there are two: one is an isosceles right angled triangle, and the other is a triangle with angles of 90-60-30 degrees.
There are no parallel lines in a triangle !
No. A parallelogram has two sets of parallel sides.
never
No triangle has parallel sides but an isosceles triangle has two equal sides of the same lengths.
NO; by definition a parallelogram is a quadrilateral with two sets of parallel sides, while a triangle has 3 sides.
A triangle has only three legs, none of which can be parallel. You may be thinking of a parallelogram.
if your talking about an isosceles triangle than no because an triangle has three sides not four.