The missing reason to complete Hector's proof is <span>Corresponding Parts of Congruent Triangles Are Congruent It's been established in the previous statement that triangle LNO and triangle PNM are congruent by the AAS Postulate. The proof </span>Corresponding Parts of Congruent Triangles Are Congruent is comprehensive.
A.) 0.55 This is because the probability has to com out to 1 (technically 100%) so, 1-0.45 is 0.55 (these could all be percentages if you multiply them by 100)