最後の問題なんですけど！答えが12になるかがわかりません！解説お願いします！

2 〈三角形の面積② 右の図は, 2点 A (3,6), B (52) 原点Oを頂点 とする △OAB である。 頂点Bからx軸に平行な直線をひき, 辺OA と 交わる点をCとするとき, 次の問いに答えなさい。 □(1) 直線 OAの式を求めなさい。 y=25 □ (2)点の座標と線分BCの長さを求めなさい。 (2)140MM □(3) △ABCの面積を求めなさい。 8cm □ (4)△OAB の面積を求めなさい。 2on² A(3,6) (12) to Cocon B (512) 2 -X

三角比です。 このような問題のとき、cos ∠ MLNで計算していかなくて、cos ∠MNLなどでも求められますか？

例題 基本例 169 正四面体の切り口の三角形の面積 1辺の長さが6の正四面体OABC がある。 辺OA, OB, OC 上に,それぞれ点 /L,M,NをOL = 3, OM=4, ON = 2 となるようにとる。 このとき, △LMNの 面積を求めよ。 TU 基本162 指針 解答 ALMN において, 辺LM, MN, NL を, それぞれ PU △OLMの辺, OMN の辺, ONLの辺 △OLM において,余弦定理により LM2=OL2+OM2-2･OL・OM cos 60° とみて, まず, 余弦定理により辺LM, MN, NL の長さを求める。 なお,正四面体の各面は,1辺の長さが6の合同な正三角形である。 CHART 空間図形の問題 平面図形を取り出す よって ゆえに =32+4²-2・3・4・1=13 AT ゆえに ALMN において, 余弦定理により cos MLN= 2 AOMN において, 余弦定理により MN²=OM2+ON²-2・OM ON cos 60°/ =4+2°-2・4・2・1/18=1 △ONLにおいて, 余弦定理により NL2=ON2+OL2-2・ON･OL cos60°=2°+3²-2・2・3・･ ·3·1/12/20 LM=√13, MN=2√3, NL=√7 0 AH-VAT 2.√/13-√7 LM2+NL2-MN2 2.LM.NL 13+7-12_4 = sin∠MLN=√1-cos² MLN 2 = √₁-( √ )²³₁ = 91 ALMN=121212 -LM.NL sin 2 MLN LM ŠTAMAŠ OHÀ A BỌ AH AH 0843 L 91 90 aid =(FCOP =∠COA=60° KAT|HA_CA=2A¬BA B 5√3 2√13./7.5/3 51/3 91 2 HI H5AX 3/AA Qe=HA O=H=1 = 200 mies 75 5√3 91 √91 ∠AOB=∠BOC 1 18 4 ALMN の3辺の長さが わかったから, p.266 例 半円題 162 (2) と同様にして △LMN の面積を求める。 N M P BA-HA-A C <0°<∠MLN <180°から sin ZMLN>0 27!

接続詞後のsvが省略されることがあるのはわかるんですが、その条件としてsが同じである事とbe動詞である事なんですよね？ sが同じなのはわかるんですが、feelってbe動詞じゃないですよね？ またownって何のために置かれてるんですか？

When creating a video game, game designers feel it is important to keep within the limits of the computer's own power. (青山学院大)

大門5の2番合ってますか？ 教えてください🙇‍♀️

ig Point マイン・カフォンと は何ですか。 エクトコ Look at this picture. Can you imagine what the device for clearing landmines. It is made of an iron ball object is? It is Mine Kafon, a wind-powered Rolling along the ground, it and bamboo legs. 5 steps on a landmine and explodes it. Even today, there are about 110 million landmines in the world. Every 22 minutes, one person is injured or killed by Many of the victims are ordinary This device is expected to reduce the landmines. people. number of landmines in the world. Mine Kafon made of? landmines are there in the world today? Massoud Hassani, a designer, wanted to solve landmine problems with the power of design. He was born in Afghanistan in 1983. At that time, there were several wars going on there. Massoud and his family lived in an area surrounded by landmines. as a child, Massoud made all his toys Living there by hand. His favorite toys were paper-made objects that were rolled by wind power. Because his toys often landed in areas with landmines, he could not get them back. Questions AMI PERHE designe des di A マスードさ のころに ちゃを Where and when was Massoud borm 2 What did Massoud make by hand

大門2合ってるか確認して欲しいです お願いします

ig Point マイン・カフォンと は何ですか。 エクトコ Look at this picture. Can you imagine what the device for clearing landmines. It is made of an iron ball object is? It is Mine Kafon, a wind-powered Rolling along the ground, it and bamboo legs. 5 steps on a landmine and explodes it. Even today, there are about 110 million landmines in the world. Every 22 minutes, one person is injured or killed by Many of the victims are ordinary This device is expected to reduce the landmines. people. number of landmines in the world. Mine Kafon made of? landmines are there in the world today? Massoud Hassani, a designer, wanted to solve landmine problems with the power of design. He was born in Afghanistan in 1983. At that time, there were several wars going on there. Massoud and his family lived in an area surrounded by landmines. as a child, Massoud made all his toys Living there by hand. His favorite toys were paper-made objects that were rolled by wind power. Because his toys often landed in areas with landmines, he could not get them back. Questions AMI PERHE designe des di A マスードさ のころに ちゃを Where and when was Massoud borm 2 What did Massoud make by hand

3.4番全てがわかんないです。 問題ごとに同じ単語を(形を変えて)空欄に入れる問題です。

3) a) You will ( b) It is ( c) We(d) 4) a) We ( 3) a) 013 b) 015 a new TV yesterday. c) 016 ) to a cottage in Nagano every summer. mant 4) a) 013 IBI would shov od) diw lnald edi mi ) bad because of a power failure you won s Bush eati problem incolaastud will sm ved T PAL ) Boy bluo (S ) to the station in ten minutes. cold outside. olyck b) All the food in the refrigerator ( yabilild rod yesterday. (S) X b) 015

写真の37番は3番のto have studied が答えなんですけど、 別のページに、現在完了形とともに使えない語で、when SVがあったんですが、受動態になると3枚目の時制のページにあった決まりは無くなるんですか？ 教えてください！

Theme 12 37 |頻出 S V They say that he studied abroad when he was young. He is said ( 3 ) abroad when he was young. to study 2 studying 3 to have studied 4 having studied ✅ has been = ( 松山大) DE

このＨの問題で (2)はアが答えですが、イでby tonight 今夜までにとしてなぜダメですか？ (3)(6)はエ、イが答えですが、他の選択肢で、多少不自然かもしれませんが、自身の生まれの町を褒めているサッカーチームとしたり、その発電所は一刻も早く(誰かに)所有されるべき... Read More

H次の各英文について、空所に入れるべき語を選び、記号で答えなさい。 1) His behavior is not ( ) with his words. 1) conservative 7) complex 2) I have a lot of things to work ( 1) by ) tonight. ウ) up 7) on 3) In England most people support the football team ( TU ) consistent 7) constructing 1) defeating 4) Most people believe that friendships usually ( 7) cooperate 5) This course is ( 7) intended I) to ) the town or city of their birth. I) representing ) praising ) over time. I) crossed ) as soon as possible. ) trained I) live 1) evolve ) invest ) for students majoring in sociology. 1) applied ) stored 6) The electric power plant should be ( 7) escaped 1) inspected 7) Late papers will not be accepted under any ( ). 7) circulation 1) circumstances ) environment 8) Take time to ( ) all of your options before you make your decision. 7) separate 1) foresee evaluate I) launch 9) ( ) the high cost, so many cities want to host international events like the Olympic of the expected effect on tourism and local businesses. 7) Though 1) In spite ) Despite 10) In the future, our diet will be ( ) more varied than it is now. 7) too much 1) yet again ) even I) headed I) possessed I) surrounding I) For I) ever

至急答えを教えてください。

16 第6問 次の問い (問1~3) において、 それぞれ下の①~⑤の語句を並 6 に べかえて空所を補い、文を完成させよ。 ただし、解答は 入るものの番号のみを答えよ。 標準解答時間 3分 1 2 3 4 問1 1 2 because he had to deliver the pizza. 問1 ① I can't ④ he was 問2 This morning I level so far this year. ① down to ④ the temperature 2 問3 I will 5 I can't promise success. ① up to ② do ② out why figure 5 3 ② had gone ⑤ to find 3 The human body 3 to ① to keep ③ a mysterious power ⑤ has 4 6 such a hurry, unless it was 3 1 " ③ in 3 4 ⑤ my best 第7問 次の問い (問1~3)において、 それぞれ下の①~⑤の語句を並 べかえて空所を補い、文を完成させよ。 ただし、 解答は 1 ~ 6 に 入るものの番号のみを答えよ。 標準解答時間 3分30秒 5 4 2 ③ woke up ④ live 4 your expectations, but the lowest 2 ② healthy ④ itself and sound.

どこが違いますか？

1} 0} JA 59 (1) ≤ (46² +4k-3) ( = Σ (46³+46² 36). ²+4² (²-3² k 62²1 FI fel +4²1(+1)² +4√(+1)(2011) 2. 20 (241) T 2 √n { ba + (n+1)² + 4 (2+1) (22+1) -9(2+11} [n[ bat a² +2a+1+4 (2n² (9²²2n+1) 98-93 ✓ = √(√₂ +2²² ₁2m+x+ Son² + 1²+²4 _9a-9) {n (99₁²+112-4)