Victory fot the ACT Exam 16e ST Sample

U NIT 4 | G EOMETRY • 185

5 . In the �igure below, what is the sum, in degrees, of the indicated angles?

Don’t Forget This! Tinhteersiuomr aonfgtlhese of an n -sided polygon is n 180 2 c − ] g . Share! Wd ohyaot us ourstes ionf yuonui trs daily life?

A. B. 5 7 4 2 0 0 C. D. 1, 9 0 0 8 0 0

TRIANGLES 6. In the �igure below, what is the length of AB ?

8. Ihny pa orti egnh ut si seoissceeql eusatl rtioa nwghl ei c, ht hoef t h e following? F. Half the length of either of the G. oTthheelresnigdtehsof either of the other sides multiplied by 20 H. Twice the length of either of the J. oTthheesrusmideosf the lengths of the other two sides 9. I o n f the triangle below, what is the length AC ? A. 3 0 B C. . 2 2 3 D. 3 3 0

Pythagorean Theorem Item #6

Don’t Forget This! Tt hheeo Pr eymt h as tgaotreesatnh e foIlnloawriinggh:t triangle, tl oh ne gseqsut asri ed eo f( tt hh ee heqyupaoltetonuthsee)siusm of toht he esrq tuwa roessi do ef st h e (the legs):

F G . . 2 2 3 H J. . 4 4 2 7. In the �igure below, what is the length of PQ ?

a b c 0 2 2 2

A B. . 1 2 0 C. 2 2 0 D. 4

45° − 45° − 90° Triangles Items #7–8

30° − 60° − 90° Triangles Item #9