{"id":"cb_question_bank:440e37dd-7b7a-4bd9-b98f-4883e3b49699","source_id":"cb_question_bank","source_item_id":"440e37dd-7b7a-4bd9-b98f-4883e3b49699","external_id":null,"ibn":"06625-DC","question_id":"933fee1a","program":"SAT","module":"math","domain_code":"S","domain":"Geometry and Trigonometry","skill_code":"S.B.","skill":"Lines, angles, and triangles","difficulty":"M","score_band":5,"answer_type":"mcq","answer_source":"key","layout_warning":null,"form_id":null,"module_number":null,"position":null,"stem":"Triangles ABC and DEF are shown above. Which of the following is equal to the ratio B C over A, B ?","stimulus":"The figure presents two right triangles, A, B C and D E F. In triangle A, B C, side A, C is horizontal and side B C is drawn such that it is perpendicular to side A, C and point B, is above point C. Angle A, is labeled 32 degrees and the right angle symbol is indicated at angle C. In triangle D E F, side D F is horizontal, side E F is drawn such that it is perpendicular to side D F, and point E, is above point F. Angle D is labeled 58 degrees and the right angle symbol is indicated at angle F.","stimulus_html":"<div class=\"stimulus_reference \">\n        <div class=\"standalone_image \">\n          <div class=\"image-options-wrapper image-wrap-center 47712 tcp-976c1cc4-99a0-4a41-b5ed-aafcf13e6478\">\n            <img src=\"/api/assets/c827fcecf7946eb8261738cbca44e93a633dc1665edce13f737fe24fdaa0317f\" alt=\"The figure presents two right triangles, A, B C and D E F. In triangle A, B C, side A, C is horizontal and side B C is drawn such that it is perpendicular to side A, C and point B, is above point C.  Angle A, is labeled 32 degrees and the right angle symbol is indicated at angle C. In triangle D E F, side D F is horizontal, side E F is drawn such that it is perpendicular to side D F, and point E, is above point F. Angle D is labeled 58 degrees and the right angle symbol is indicated at angle F. \" width=\"172\" height=\"86\"></div>\n        </div>\n      </div>\n","stem_html":"<p class=\"stem_paragraph \">Triangles <span class=\"italic\">ABC</span> and <span class=\"italic\">DEF</span> are shown above. Which of the following is equal to the ratio <span class=\"math-container\"><img align=\"middle\" role=\"math\" class=\"math-img\" src=\"/api/assets/b22dae3ffa7bf10e610d5e16c8f13d4526244590fde6299d03697451d38763ef\" alt=\"B C over A, B\"></span>?</p>\n","rationale_html":"<p>Choice B is correct. In right triangle <span class=\"italic\">ABC</span>, the measure of angle <span class=\"italic\">B</span> must be 58° because the sum of the measure of angle <span class=\"italic\">A</span>, which is 32°, and the measure of angle <span class=\"italic\">B</span> is 90°. Angle <span class=\"italic\">D</span> in the right triangle <span class=\"italic\">DEF</span> has measure 58°. Hence, triangles <span class=\"italic\">ABC</span> and <span class=\"italic\">DEF</span> are similar (by angle-angle similarity). Since <span class=\"math-container\"><img align=\"middle\" role=\"math\" class=\"math-img\" src=\"/api/assets/28ddeb9057580c7e30bf35d0a356276556d1018a2bc2bc33e2c76d746b8a8cfa\" alt=\"side B C\"></span> is the side opposite to the angle with measure 32° and <span class=\"italic\">AB</span> is the hypotenuse in right triangle <span class=\"italic\">ABC</span>, the ratio <span class=\"math-container\"><img align=\"middle\" role=\"math\" class=\"math-img\" src=\"/api/assets/b22dae3ffa7bf10e610d5e16c8f13d4526244590fde6299d03697451d38763ef\" alt=\"the length of side B C over the length of side A, B\"></span> is equal to <span class=\"math-container\"><img align=\"middle\" role=\"math\" class=\"math-img\" src=\"/api/assets/c672d1c52257f745c88539df7d49c3d1646d5c4f70f8d7233bfcabd43d09eb96\" alt=\"the length of side D F over the length of side D E\"></span>.</p><p>Alternate approach: The trigonometric ratios can be used to answer this question. In right triangle <span class=\"italic\">ABC</span>, the ratio <span class=\"math-container\"><img align=\"middle\" role=\"math\" class=\"math-img\" src=\"/api/assets/31205f51fc3d60298fa644ae2ef89f5d1b3c5db6a17bf3e7ebd46a7f1aaf159f\" alt=\"the length of side B C over the length of side A, B equals, the sine of 32 degrees\"></span>. The angle <span class=\"italic\">E</span> in triangle <span class=\"italic\">DEF</span> has measure 32° because <span class=\"math-container\"><img align=\"middle\" role=\"math\" class=\"math-img\" src=\"/api/assets/8d1df735435f5a9f12a27697a638e3b366c4d43eac90f63dde9e0e6bcfce0456\" alt=\"the measure of angle D, plus the measure of angle E, equals 90 degrees\"></span>. In triangle <span class=\"italic\">DEF</span>, the ratio <span class=\"math-container\"><img align=\"middle\" role=\"math\" class=\"math-img\" src=\"/api/assets/50f59d47059651990fdc07f557691ba60a8af70092c613d104e668f6d90d8e70\" alt=\"the length of side D F over the length of side D E, equals the sine of 32 degrees\"></span>. Therefore, <span class=\"math-container\"><img align=\"middle\" role=\"math\" class=\"math-img\" src=\"/api/assets/231ce3b3eddb803bbd3f63c0e3f607cce6cd1a0997f2c768be5fdde0aea39138\" alt=\"the length of side D F over the length of side D E, equals, the length of side B C over the length of side A, B\"></span>.</p><p>Choice A is incorrect because <span class=\"math-container\"><img align=\"middle\" role=\"math\" class=\"math-img\" src=\"/api/assets/679ce11bdcdf03e9fd2cf417125317f6da2a4789164b055f25f083c783bad739\" alt=\"the length of side D E over the length of side D F\"></span> is the reciprocal of the ratio <span class=\"math-container\"><img align=\"middle\" role=\"math\" class=\"math-img\" src=\"/api/assets/b22dae3ffa7bf10e610d5e16c8f13d4526244590fde6299d03697451d38763ef\" alt=\"the length of side B C over the length of side A, B\"></span>. Choice C is incorrect because <span class=\"math-container\"><img align=\"middle\" role=\"math\" class=\"math-img\" src=\"/api/assets/2d1779fbb88088fd425ef751405ed8bb5cf3c48348e7254e8e0781234d71af47\" alt=\"the length of side D F over the length of side D E, equals the length of side B C over the length of side A, C\"></span>, not <span class=\"math-container\"><img align=\"middle\" role=\"math\" class=\"math-img\" src=\"/api/assets/b22dae3ffa7bf10e610d5e16c8f13d4526244590fde6299d03697451d38763ef\" alt=\"the length of side B C over the length of side A, B\"></span>. Choice D is incorrect because <span class=\"math-container\"><img align=\"middle\" role=\"math\" class=\"math-img\" src=\"/api/assets/45f751e3b69f456ffc92303b79818864ae853a5b2accb149e076b9a5590d3ca9\" alt=\"the length of side E F over the length of side D E, equals, the length of side A, C over the length of side A, B\"></span>, not <span class=\"math-container\"><img align=\"middle\" role=\"math\" class=\"math-img\" src=\"/api/assets/b22dae3ffa7bf10e610d5e16c8f13d4526244590fde6299d03697451d38763ef\" alt=\"the length of side B C over the length of side A, B\"></span>.</p><p></p>\n","correct_answer":["B"],"has_media":true,"has_mathml":false,"has_table":false,"source_created_at":"2023-08-02T20:25:59.630000+00:00","source_updated_at":"2023-08-02T20:25:59.630000+00:00","options":[{"label":"A","content_html":"<span class=\"math_expression \">\n            <span class=\"math-container\"><img align=\"middle\" role=\"math\" class=\"math-img\" src=\"/api/assets/679ce11bdcdf03e9fd2cf417125317f6da2a4789164b055f25f083c783bad739\" alt=\"D E over D F\"></span></span>\n","ord":0},{"label":"B","content_html":"<span class=\"math_expression \">\n            <span class=\"math-container\"><img align=\"middle\" role=\"math\" class=\"math-img\" src=\"/api/assets/c672d1c52257f745c88539df7d49c3d1646d5c4f70f8d7233bfcabd43d09eb96\" alt=\"D F over D E\"></span></span>\n","ord":1},{"label":"C","content_html":"<span class=\"math_expression \">\n            <span class=\"math-container\"><img align=\"middle\" role=\"math\" class=\"math-img\" src=\"/api/assets/80e2c712bb7528fdbeb0161f15c29b9d15479e0ce999f2a673bf1b618f80902f\" alt=\"D F over E F\"></span></span>\n","ord":2},{"label":"D","content_html":"<span class=\"math_expression \">\n            <span class=\"math-container\"><img align=\"middle\" role=\"math\" class=\"math-img\" src=\"/api/assets/5ca27dcc7c02032b7ba3b08783c745e01ddc8b29223c8ce33cf7158b9db54167\" alt=\"E F over D E\"></span></span>\n","ord":3}],"attribution":{"source_id":"cb_question_bank","source_name":"College Board digital SAT question bank (community dump)","rights_holder":"College Board","canonical_url":"https://satsuitequestionbank.collegeboard.org/","retrieved_from":"https://raw.githubusercontent.com/mdn522/sat-question-bank/main/data/cb-digital-questions.json","attribution":"SAT practice questions © College Board, from the official SAT Suite Question Bank. Retrieved via the community dump at github.com/mdn522/sat-question-bank.","disclaimer":"SAT® and PSAT/NMSQT® are trademarks registered by the College Board, which is not affiliated with, does not sponsor, and does not endorse this project.","license":"College Board copyright; source repository carries no licence. Local use only.","redistributable":false,"item_count":2017}}