Question

In a triangle abc angle a + angle b is 110° , angle c + angle a is 135° . find angle a

Answer 1

as we know that the sum of angles of a triangle is 180 

here,

angle A + angle B =110

angle A + angle C= 135

now,

180 = (angle A + angle B) - angle A + (angle A + angle C)

180= 110 + 135 - angle A 

180 - 110 - 135 = angle A 

180-245 = - angle A

- 65 = - angle A

65= angle A 



 i hope this will help you



- by ABHAY