91Ó°ÊÓ

Suppose someone plans to write an indirect proof of the conditional. Write a correct first sentence of the indirect proof.

If $x^2≠y^2$, then $x≠y$.

Suppose someone plans to write an indirect proof of the conditional. Write a correct first sentence of the indirect proof.

If $x^2≠y^2$, then $x≠y$.

Suppose someone plans to write an indirect proof of each conditional. Write a correct first sentence of the indirect proof.

If $\stackrel{¯}{EF}\cancel{â‰\dots }\stackrel{¯}{GH}$, then $\stackrel{↔}{EF}$and $\stackrel{↔}{GH}$aren’t parallel.

For the following figure, name the longest and the shortest side of the triangle.

Classify the following conditional as true or false. Then state its inverse and contrapositive and classify each of these as true or false.

If a triangle is equilateral, then it is equiangular.

For the following conditional statement, classify the statement as true or false.

If $c-5>45$, then $c>48$.

What is the first sentence of an indirect proof of the statement shown?

Kim isn't a violinist.

Suppose someone plans to write an indirect proof of each conditional. Write a correct first sentence of the indirect proof.

If $\stackrel{¯}{EF}\cancel{â‰\dots }\stackrel{¯}{GH}$, then$\stackrel{↔}{EF}$ and$\stackrel{↔}{GH}$ aren’t parallel.

When some people are given that $j>k$and $l>m$, they carelessly concluded that $j+k>l+m$. Find the values for j, k, l, and m that shows this conclusion is false.

For each statement in Ex 5-10 copy and complete a table like the one shown below.