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BACK |
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(-4,-3), |
(2 , 3) , |
(1 , -2) |
مساحة المثلث بمعلومية إحداثيات رؤوسه مثلاً
:ــ |
-1 |
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AB = 8.485 |
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C′=8.485 |
8.485 |
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AC = 5.099 |
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B′=5.099 |
5.099 |
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CB = 5.099 |
B |
(2,3) |
A′=5.099 |
5.099 |
Area = |
12 |
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-4 -3 -2
-1 0 |
1
2 3 4 |
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-2 C(1,-2) |
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-3 |
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A |
(-4,-3) |
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-4 |
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permut ( 3;2 )
= 6 |
⇒ |
Permutations of the three triangle heads two by
two. |
-2 |
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تباديل 3
عناصر مأخوذة اثتثن اثنين |
سنختار واحدة من الستة AC, BC |
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Note: COMBIN(3;2) = 1 |
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القانون |
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توافيق 3 عناصر مأخوذة اثتثن اثنين |
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AC |
C-A |
(5, 1) |
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BC |
C-B |
(-1, -5) |
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-3 |
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القانون |
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Area = 12 |
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-4 |
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cos(<C) = (26 +
26 - 72)/(2*26) = -3846 |
<C = 112.6 |
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Area =
0.5*CA*CB*SIN(<C) القانون |
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Area =
0.5*√26*√26*SIN(112.6*pi()/180) = 12 |
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-5 |
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Slope AB = (3+3)/(2+4) = 6/6 = 1 |
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Equtyon AC is (y-3) = 1*(x - 2) |
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Equtyon AC is y - x - 1 = 0 |
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-6 |
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قانون |
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Area = 12 |
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-7 |
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قانون |
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Area = 12 |
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-8 |
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قانون |
قانون |
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Area = 12 |
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-9 |
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استخدام المساحة لمثلث وشبه المنحرف |
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5y = x - 11 |
y = 5x - 7 |
y = x + 1 |
← Equations |
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x |
y |
x |
y |
x |
y |
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-4 |
-3 |
1 |
-2 |
2 |
3 |
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1 |
-2 |
2 |
3 |
-4 |
-3 |
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series4 |
series5 |
series6 |
series7 |
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x |
y |
x |
y |
x |
y |
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y |
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1 |
0 |
2 |
3 |
-4 |
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1 |
-2 |
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1 |
-2 |
2 |
0 |
-4 |
0 |
-1 |
0 |
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3.6 |
A1=0.5*2.4*3 |
Δ GCF |
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0.4 |
A2=0.5*0.4*2 |
Δ BFE |
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8 |
A3= شبه المنحرف -مثلث ΔBFHA-ΔGHA |
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= |
A3=0.5*(2+3)*5-0.5*3*3=12.5-4.5=8 |
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12 |
المساحة المطلوبة |
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Area = 12 |
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-10 |
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استخدام التكامل لحساب المساحة تحت المنحنى
وفوق محور السينات |
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BACK |
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A = 4.5 - 0.9
+ 0.4 + 12.5 - 4.5 |
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Area = 12 |
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-11 |
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From B to AC |
قانون طول العمود |
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OR |
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قانون البعد لنقطتين |
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Area = 12 |
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-12 |
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Area = 0.5 * BC * AD |
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X |
Y |
X |
Y |
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1 |
-2 |
-4 |
-3 |
للرسم |
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0.62 |
-3.92 |
0.62 |
-3.92 |
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Area = 12 |
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يمكن تكرار ذلك مع الرأسين الآخرين |
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الإضافات على الرسم كالمعادلات للعلم
والمطلوب المثلث ABC والعمود فقط AD |
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BACK |
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-13 |
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Funcation in Excel:- |
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Area = 0.5*MDETERM({1,-2,1;2,3,1;-4,-3,1}) |
القاعدة |
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حساب قيمة المحدد (MDETERM) لرؤوس المثلث
بإضافة عمود الوحدة |
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Area =12 |
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