Question

In triangle abc angle a 70 degree , ab 5.5 cm , bc 5.5 cm. find angle ABC and angle BCA​

Answer 1

angle ABC = 55 degree

angle BCA = 55 degree

Step-by-step explanation:

angle A or angle CAB = 70 degree

angle ABC+BCA+CAB = 180 degree

or, angle ABC + BCA = 110 degree.

now since ab and bc = 5.5 cm, it's an isosceles triangle. so angle ABC = angle BCA.

therefore, 2 ABC = 110

ABC = 55.

therefore, BCA = 55