Question

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​

Answer 1

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°

Answer 2

Answer:

We have,

A−B=15

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