Victory for the ACT Student Text 15e

258 • M ATH

Š‹• •‡…–‹‘…‘–ƒ‹• –™‘ ƒ–Š‡ƒ–‹…• “—‹œœ‡•Ǥ Š‡ ϐ‹”•– “—‹œ ‹• ƒ †‹”‡…–‡† •–—†› “—‹œǤ Š‡ †‹”‡…–‡† •–—†› “—‹œ ‹• ‘– –‹‡†Ǥ •™‡” ‡ƒ…Š “—‡•–‹‘ ƒ†…Š‡… ›‘—” ™‘” ƒ• ›‘— ‰‘Ǥ Š‡ •‡…‘† “—‹œ ‹• ƒ –‹‡† “—‹œǤ ƒ‡ –Š‡ •‡…‘† “—‹œ —†‡” –Š‡ ‹†‹…ƒ–‡† –‹‡†…‘†‹–‹‘• –‘ ’”ƒ…–‹…‡ ›‘—” ’ƒ…‹‰ ƒ• ›‘— ƒ’’Ž› ™Šƒ– ›‘— Ž‡ƒ”‡† ‹ –Š‡ ƒ–Š‡ƒ–‹…• ‡••‘•Ǥ

DIRECTIONS: Solve each item and choose the correct answer choice. Calculator use is permitted; however, some items are best solved without the use of a calculator. DIRECTED STUDY QUIZ (20 items; 20 minutes)

EXPLANATIONS NOTES: ŽŽ ‘ˆ –Š‡ ˆ‘ŽŽ‘™‹‰ •Š‘—Ž† „‡ ƒ••—‡†ǡ unless otherwise stated. 1. ŽŽ—•–”ƒ–‹˜‡ ϐ‹‰—”‡• ƒ”‡ ‡…‡••ƒ”‹Ž› †”ƒ™ –‘ •…ƒŽ‡Ǥ 2. The word average indicates arithmetic mean. 3. The word line ‹†‹…ƒ–‡• ƒ •–”ƒ‹‰Š– Ž‹‡Ǥ 4. ‡‘‡–”‹…ϐ‹‰—”‡• Ž‹‡ ‹ ƒ ’Žƒ‡Ǥ 1. (A) Mathematics/Geometry/Lines and Angles & & x x x x 60 2 3 180 5 120 24 + + = = = .

Throwback to Math

 –Š‡ –”‹ƒ‰Ž‡ „‡Ž‘™ǡ x

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1.

Class Remember the ƒ‰Ž‡• ‹ ƒ –”‹ƒ‰Ž‡ must sumto 180°.  ‰‡‡”ƒŽǡ ˆ‘” ƒ ’‘Ž›‰‘ ™‹–Š n sides, the sum of ‹–• ‹–‡”‹‘” ƒ‰Ž‡• must sum to: ( ) ° n 2 180 # .

Ǥ ʹͶ B. 20 C. 16 D. 12 E. 10