Qualification > Math
IGCSE MATHS Doubts
Ghost Of Highbury:
IGSCE Math Paper 2 Nov 02, Answer 12)b.
As EF and DC are parallel, ED is the transverse and thus angle EDC is 71 degree.(180-109) (Corresponding angle to DEF)
As ED and BC are parallel , DC is the transverse and thus angle DCB is 109 (180-71) (Corresponding angles rule)
Now, as the polygon has 6 sides, the sum of the angles is (6-2) * 180 = 720 degrees.
They've mentioned that Angle FAB and ABC are equal thus, 720 - 95 - 109 - 71 - 109 = 336 degrees.
336 degrees is the sum of the equal angles FAB and ABC. Therefore , angle FAB = ABC = 336/2 = 168 degrees.
The Golden Girl =D:
--- Quote from: A@di on May 01, 2010, 09:27:37 am ---IGSCE Math Paper 2 Nov 02, Answer 12)b.
As EF and DC are parallel, ED is the transverse and thus angle EDC is 71 degree.(180-109) (Corresponding angle to DEF)
As ED and BC are parallel , DC is the transverse and thus angle DCB is 109 (180-71) (Corresponding angles rule)
Now, as the polygon has 6 sides, the sum of the angles is (6-2) * 180 = 720 degrees.
They've mentioned that Angle FAB and ABC are equal thus, 720 - 95 - 109 - 71 - 109 = 336 degrees.
336 degrees is the sum of the equal angles FAB and ABC. Therefore , angle FAB = ABC = 336/2 = 168 degrees.
--- End quote ---
thx again :)
Ghost Of Highbury:
ur welcome. :D
holtadit:
1.5 0
0 1
For this matrice isnt the inverse:
1 0
0 1.5
But the MS says 1 0
0 1.5
astarmathsandphysics:
It is the same. multiple each entry in the ms matrrix by 1/1.5 to get your matrix
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