Jonas draws a triangle, measures its three angles, and adds the measures together. He draws several more triangles and does the same thing. He writes the following conjecture: The measures of the three angles of a triangle add up to 180°. Which of the following statements is true? Jonas believes that his conjecture only applies to the triangles he drew and measured. Jonas knows that his conjecture is true for all triangles.
Jonas believes his conjecture is true for all triangles.
None of the above.