a b c are three angles of a triangle if a minus b is equal to 15 degrees and B minus c is equal to 30 degrees then angle A is equal to
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Answered by
10
Answer:
a+b+c= 180°. eq (1) ( by angle sum property of triangle)
given that: a-b = 15° eq(2)
b-c= 30° eq (3)
on adding eq 2 and 3, we get
a-c = 45° eq (4)
c = a- 45
from eq 2, we get
b= a-15
on putting the value of b and c in eq (1), we get
a+b+c= 180
a + a - 15 + a - 45= 180
3a - 60 = 180
3a = 180 + 60
3a = 240
a = 240/3
a = 80
Hence the value of angle a us 80°
Answered by
0
Answer:
We have,
A−B=15
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