Ch 2 Review (Condensed) Sections 2.2,
Question #1 For the given statement, write the if-then form, the converse, the inverse, and the contrapositive. Determine the truth value of each statement. Ants are insects.
Answer to #1 If-Then: If you are an ant, then you are an insect. (T) Converse: If you are and insect, then you are an ant. (F) Inverse: If you are not an ant, then you are not an insect. (F) Contrapositive: If you are not an insect, then you are not an ant. (T)
Question #2 Determine if the statement is a good definition. If not, state “No” and explain, if so, state “Yes” and write it as a bi-conditional. If two rays are opposite rays, then they have a common endpoint.
Answer to #2 No. The converse of the statement is not true. Two rays could have a common endpoint and not be opposite rays.
Question #3 Complete the proof by filling in the missing statements and reasons.
Answer to #3 2. m<1=90, m<2=90 3. Transitive POE 4. Definition of Congruent Angles
Question #4 Complete the proof by filling in the missing statements and reasons.
Answer to #4 1. Given 2. <B and <C are right angles 3. Right Angle Congruence Theorem
Question #5 Name the property. A) B) C)
Answer to #5 A) Transitive POC B) Symmetric POC C) Reflexive POE
Question #6 Solve the equation by writing a 2-column proof. 2x-15-x=21+10x
Answer to #6 StatementsReasons 2x-15-x=21+10xGiven x-15=21+10xSimplify -15=21+9xSubtract POE -36=9xAdd POE -4=xDivision POE x=-4Symmetric POE
Question #7 Solve for x. Then, state which property you used to set up the problem.
Answer to #7 x = 3 Transitive POC
Question #8 Find the values of x and y. Then, state which postulate or theorem you used to set up the problem.
Answer to #8 X = 11 Y = 17 Vertical Angle Congruence Theorem
Question #9 Find the values of x and y. Then, state which postulate or theorem you used to set up the problem.
Answer to #9 X = 18 Y = 13 Linear Pair Postulate