國中 解答

Where can you find the smallest library in the world?

What may you mean in the poem?

Feeding the homeless is not the only thing keeps the girl busy.

Do you know the girl ?

The boy and the dog are running in the park live next to me..

I am reading the letter by my cousin.

The boy that the violin well is my son.

The movie star who she ___ is getting more and more famous.

A: Ted never goes swimming in winter. B:

Peter’s not seen Helen since last year, and I.

This is the most interesting story I’ve ever read.

He often himself by listening to the music when he is tired.

It is to play balls when you walk on the street.

Some fruit is in vitamin(維他命)C, so remember to eat it every day.

My mother is a woman, not a housewife.

There is no near the restaurant, so let’s take the bus there.

I bought a cup of Coke and some before I entered the theater.

Don’t put too much when you cook. It’s not good for our health.

I need someone to go take one pack of chalk for me. Any ?

Ivy likes to . She spends most of her time growing flowers and plants.

My brother likes to play baseball, , and tennis. He plays sports a lot.

( ) 如右圖所示,用三個完全相同的直角三角形緊密結合,拼出一個四邊形 ABCD。 已知,四邊形 ABCD 的周長為 22。 甲說:四邊形 ABCD 是梯形 乙說:△ABC 是正三角形 ̅̅̅̅ = 10 − 2√3 丙說:AB

( ) ̅̅̅̅ 邊上D′, 如右圖,有一張矩形的名片 ABCD,把 D 摺到BC ̅̅̅̅ 。 摺痕為AE ̅̅̅̅ 的中點 <甲>E 是CD 2 ̅̅̅̅̅′ 2 + ̅̅̅̅ <乙>CD CE 2 + ̅̅̅̅̅ AD′ = ̅̅̅̅ AE 2 僅供學生練習使用,不允許商業用途 <丙>△ ABD’~ △ D’CE (AA 相似)

( ) 已知:如右圖,四邊形 ABCD 以及 ̅̅̅̅ = ̅̅̅̅ 四邊形 AEFG 皆為正方形,求證DE BG 。 甲、乙兩生想求證此題,他們的證明過程如下: <甲>在△ADE 和△ABG 中, <乙> ̅̅̅̅ BG 2 = ̅̅̅̅ AG 2 + ̅̅̅̅ AB 2 (∵∠BAG = 90° 畢氏定理) ̅̅̅̅2 (∵AE ̅̅̅̅ = AG ̅̅̅̅ , AD ̅̅̅̅ = AB ̅̅̅̅ 都是正方形) = ̅̅̅̅ AE 2 + AD ̅̅̅̅ AE = ̅̅̅̅ AG (四邊形AEFG為正方形) ̅̅̅̅ AD = ̅̅̅̅ AB (四邊形ABCD為正方形) ∵{ = ̅̅̅̅ DE 2 (∵∠DAE = 90° 畢氏定理) ∠DAB = ∠BAG = 90° (四邊形 AEFG 和 ABCD 都是正方形) ̅̅̅̅ 2 = ̅̅̅̅ ̅̅̅̅ > 0,DE ̅̅̅̅ > 0 ⇒ BG DE 2 且 BG ̅̅̅̅ = ̅̅̅̅ ∴△ADE≅△ABG(SAS 全等性質)故DE BG ⇒ ̅̅̅̅ BG = ̅̅̅̅