Web【题目】 如图，在等腰三角形abc中，∠bac=120°，ab=ac=2，点d是bc边上的一个动点（不与b、c重合），在ac上取一点e，使∠ade=30°． （1）求证： abd∽ dce； （2）设bd=x，ae=y，求y关于x的函数关系式并写出自变量x的取值范围； （3）当 ade是等腰三角形时，求ae的长． WebThe Latest News and Updates in Massachusetts News brought to you by the team at NEWS10 ABC:
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Web15 In triangle ABC below, D is a point on AB and E is a point on AC, such that DE BC. Which statement is always true? 1) ∠ADE and ∠ABC are right angles. 2) ADE ∼ ABC 3) DE = 1 2 BC 4) AD ≅DB 16 In the diagram below, ABC ∼ ADE. Which measurements are justified by this similarity? 1) AD =3, AB =6, AE =4, and AC =12 2) AD =5, AB =8, AE ... Web(1)证明: ∵bc=10 ,cd=8,bd=6,∴bd^2+dc^2=bc^2 ∴ bdc是直角三角形∴∠cdb=90° (2)解:设ac=x.∵ab=ac=x , ∴ad=x-6由(1),知∠cdb=90°, ∴ acd 为直角三角形,∴x^2=(x-6)^2+8^2 ,解得 x=(25)/3故ac的长为 (25)/3解题通法利用勾股定理及其逆定理综合解题的方法:通过勾股定理的逆定理证明一个 ...
WebIn a ABC , AD is the bisector of ∠ BAC. If AB =8 cm , BD =6 cm and DC =3 cm. Find ACa 4 cmb 6 cmc 3 cmd 8 cm. Login. Study Materials. NCERT Solutions. NCERT Solutions For Class 12. NCERT Solutions For Class 12 Physics; ... If AB = 10 cm, AC = 14 cm and BC = 6 cm, find BD and DC. WebCho tam giác ABC vuông tại A có AB = 8 cm, BC = 10 cm. Trên AB và BC lấy D và E sao cho AD = 5 cm , BC = 4 cm. a) CM : tam giác BED đồng dạng tam giác BAC b) Tính DE , biết chu vi của tam giác ABC = 25cm Loga Sinh Học lớp 12 0 lượt thích 4 ...
WebIf in triangles ABC and DEF, AB = DE, BC = EF, and CA = FD, then triangle ABC is congruent to triangle DEF. Proof: This was proved by using SAS to make "copies" of the two triangles side by side so that together they form a kite, including a diagonal. Then using what was proved about kites, diagonal cuts the kite into two congruent triangles.
WebMath. Geometry. Geometry questions and answers. Let AB==8, AC=10, and BC=12 sides of a triangle ABC. Let be the point BC on such that BD/DC . The distance between points and is:
WebQuestion In ABC, If BC=AB and ∠B=80 ∘, then ∠A is equal to: A 80 ∘ B 40 ∘ C 50 ∘ D 100 ∘ Easy Solution Verified by Toppr Correct option is C) BC=AB ⇒∠A=∠C (As angles opposite to equal side are equal) let thte angles be x each. Now by angle sum property ∠A+∠B+∠C=180 ∘⇒x+80 ∘+x=180 ∘⇒2x=180 ∘−80 ∘⇒2x=100 ∘⇒x=50 ∘∴∠A=50 ∘ Was this answer helpful? … how to take emails from excel to outlookWebNBC Boston – Boston News, Local News, Weather, Traffic, Entertainment, Breaking News. Trending. 24/7 Streaming News Trump Indictment Mac Jones Boston Marathon The Free … ready refresh local numberWebAug 22, 2015 · Best Answer. According to Melody's diagram, the triangle formed by the origin and B and C has an area of (1/2)*(8)*(6) = 24 sq cm . And the triangle formed by the origin and A and C has an area of (1/2)*(1)*(8) = 4 sq cm how to take emojis off picturesWebNov 2, 2024 · Explanation: It is given that In ABC, AB=8, BC=10, and AC=12. Let M, N, and K be the midpoints of the sides of ABC. The mid point theorem states that if a line segment joining the midpoints of two sides of the … how to take email off of outlookWebMath. Geometry. Geometry questions and answers. Let AB==8, AC=10, and BC=12 sides of a triangle ABC. Let be the point BC on such that BD/DC . The distance between points and is: how to take emergency balance in banglalinkWebOct 21, 2024 · In right triangle ABC, AB = 10, AC = 6 and BC = 8 units. What is the distance from C to the midpoint of segment AB? 2 See answers Advertisement chi3fcomm5nd Using herons formula you find the area s=24/2=12 A=24 and A=0.5 base height sp 24=0.5 (base=AB=10) (height=c to the midpoint of segment AB) 24=5 (height) =height … how to take emirates id copy onlineWebHint: ab+ bc +ac = 2(a+b+c)2−(a2+b2+c2). The number of ordered triples (a,b,c) of positive integers which satisfy the simultaneous equations ab +bc = 44, ac +bc = 33. Your solution … ready refresh phone number illinois