Chapter 10.3, Problem 18E

Choose from the terms below to fill in the blanks for exercises 7–34. Each of the terms will be used at least once.

vertex	supplementary angles	corresponding angles	$\angle a$	$\angle e$
a straight angle	complementary angles	alternate interior angles	$\angle b$	$\angle f$
an obtuse angle	vertical angles	transversal	$\angle c$	$180°$
an acute angle			$\angle d$

Use the figure to the right to answer exercises 17–24.

$\angle d\text{ and }\angle b\text{ are called}$ _____.