What is the perimeter of the figure?

19.1 yd^2

19.1 yd

20.0 yd^2

20.0 yd

19.1 yd perimeter of a triangle is addition of length of each sides so add 5+6.1+8 =19.1 yd

instead of showing that the conclusion to be proved is true, you show that all of the alternatives are false. To do this, you must assume the negation of the statement to be proved. Then, deductive reasoning will lead to a contradiction: two statements that cannot both be true.