Angles of quadrilateral are in AP if product of first and fourth angle and product of second and third angle are in ratio 27:35nfind angles of quadrilateral
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Answer:
The angles in quadrilateral is 135°,105°,75°,45°...
Step-by-step explanation:
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Step-by-step explanation:
Given a3 = 11
a5 = 27
a + 2d = 11 ....(1)
a + 4d = 27 ....(2)
from 1 and 2
a + 2d = 11
a + 4d = 27
(-)__(-)___(-)_
-2d = -16
d = 8
substitute d = 8 in 1
a+ 2d = 11
a + 2× 8 = 11
a= 11 - 16
a = -5
S68 = n/2 [2a + ( n-1 ) d ]
= 68/2 [ 2× -5 + ( 68-1 ) 8]
= 34 ( -10 + 67×8)
= 34 ×526
= 17844
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