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English Senior High

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ON Po0-0。 ce から-っ に基づい 表び、る てop 、 その番紀を 答えとして最 ークしなきい も壮切なものを、 のヘー most jikely be e で more famous than they are today. -A taveler ing G w cxploring Germanys sccnic Ri v y CrmanysS sccnic Rhine River who visits the dty Of Bingen will be directed to the hi m the history i Seum there, which features front and center the amazing career of Saint エTi Su 隊 asant Cy 9 rmeenty se 202 Gm am ace ko ery sense a issance ogx。 born a htHle more than three and| き half centuries before the greatest Renaissance man Leonardo da Vinci (1432.1519). Hildegard was not only a composer of church music but also a mystic。 es a playwright an 7 Re and a sharp observer of natural phenomena on earth and in the skies. Tronically she had becn a sickly child and her aristocrat father did not hold much hope for her fature should she choose a normal life. Hle felt her only possibihty of personal happiness Would be in the service of God as a nun. isolated from the stresses of daily decision-making. Fortunately for Hildegard, Jutta von Spanheim, her mentor, saw in her an unusual abihty。 and ldegard was able to develop it to such a high degree that she became famous in her long jifetime of eighty-one yearS, even going on tOurS throughout Europe to promote her ideas and professed God-given ViSionS. _) Hildegard was a member of the Benedictine Order、 That meant a hife of balanced sleep.a Yegetarian diet regular DraYer and lots of hard work Her frst book, /zber Sczps (Koz 7e ld be a widely read description of the coSmos based on ancient Greek ideas、 It Ps), woul jwas believed to be a divinely inspired work in its time and Would not be matched by any man 邊he short biographies on Hildegard di al for centuries, lo not ahways detail her mus nm them, but Hildegard composed noteworthy liturgical pieces jpositions, 中 even mentio」 eered in developing the musical morality for ublic religious ceremony). She also pion in character of a StorY is presented with herheorsheis granted entry into here the mal a dilemma of choice mcept where and evil which wil determine Whet heaven e.Ytaly, and the Year 1619、 It was the tme of the Baroque. Nght

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Mathematics Senior High

(チャート数1) 解答6行目の「ゆえに、〜」の式が何故成立するのかわかりません。相似比でしょうか…?

し0 165 上 Pa 10/ 和なの=肛 ”。。。 6@@OO 頂角Aが36" の二等辺三角形 ABC がぁる。 と辺 AB との交点をD とする。 () BC=ニ1 のとき, 線分DB, AC の長さを求めよ。 (2) (1) の結果を用いて, cosa6s の値を求めよ。 この三角形の底角Cの二等分線 【頻 神戸学院大] YS 人穫 -才基本 103 enART二 四ororrow ①⑪ 図をかいて角の大きさを調べると へABCcoへCDB (2 角が等しい) がわか る。 DBニテ とおき, 相似な三角形の辺の比を利用 して方程式を作る。 (2) 三角比であるから, 36? の内角をもつ 直衣三角形 を作る。 / ACB三(180*一36)ー2三72 であるから ンDCB三72882財86 ムへABC と へCDB におWゆで BACニンDCB=36?。ンACBニンCBD=72* 3 よって へABCの人へ@DB で 2 角が等しい。 、 。 B⑨訂U の 相似形は, 頂点が対応す ゆえに, っ でpi らち較上5 ICU AUDI るように順に並べて書く。 AD=CD=BC三1 であり目DB主xiこおく< ⑪ AB=AD十DBテニ1十ヶ であるから, ① は 12?三(1十ヶ)称 よって ァ?ギz思時0 これを解いて ェーー ィ>0 であるから すなわち pp=5 1 ②⑫ あ粒語Y6EAa王1トー 2 辺 AC の中点をとすると, 人DCA は三等辺三角形であ るから DETAC 5 玩 ()から AD=1, Ap=すAc=そと 5 +1 よって os 邊本

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