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maths~10
2007-06-09 9:34 am
回答 (4)
2007-06-09 9:51 am
✔ 最佳答案
tan 45°= 5/(b-2)1 = 5/(b-2)
b-2 = 5
b = 7
2007-06-09 5:25 pm
the answer is 7
2007-06-09 9:50 am
b=7
你可以當 x-軸 上面嗰個點做 (b,0)
因為 tan 45 = 1 or 你可以直頭當佢係等腰三角形
夾住 90度角嗰兩條邊就相等..
ie. b-2 = 5-0
b= 7
你可以當 x-軸 上面嗰個點做 (b,0)
因為 tan 45 = 1 or 你可以直頭當佢係等腰三角形
夾住 90度角嗰兩條邊就相等..
ie. b-2 = 5-0
b= 7
參考: me
2007-06-09 9:50 am
The answer is: b = 7
Since the inclination is 45 deg, the triangle is an isosceles triangle with two sides being 5 units in length.
Hence, b - 2 = 5 => b = 7
Since the inclination is 45 deg, the triangle is an isosceles triangle with two sides being 5 units in length.
Hence, b - 2 = 5 => b = 7
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