Chapter 4.6, Problem 11PSA

a.

To determine

To find: The appropriate words to complete the given sentence.

Answer to Problem 11PSA

  $\angle ECD$ .

Explanation of Solution

Given information:

A figure is given as below.

  

Calculation:

A figure is given as below.

  

Here line $\overleftrightarrow{EC}\text{ and }\overleftrightarrow{AB}$ are parallel lines.

So, for lines $\overleftrightarrow{EC}\text{ and }\overleftrightarrow{AB}$ a pair of corresponding angle are $\angle ABC\text{ and }\angle ECD.$

Hence, appropriate word would be $\angle ECD$ .

b.

To determine

To find: The appropriate words to complete the given sentence.

Answer to Problem 11PSA

  $\angle CEB$ .

Explanation of Solution

Given information:

Same as part $a$ of this exercise.

Calculation:

A figure is given as below.

  

Here line $\overleftrightarrow{EC}\text{ and }\overleftrightarrow{AB}$ are parallel lines.

So, for lines $\overleftrightarrow{EC}\text{ and }\overleftrightarrow{AB}$ a pair of alternate interior angle are $\angle ABE\text{ and }\angle CEB.$

Hence, appropriate word would be $\angle CEB$ .