Question

one of the angles of a triangle is 60 degree . the difference between the other two angle is 20 degree . then what is the measure of the smallest angle ????​

Answer 1

Answer:

let the angles are A B C

here, A=60

so, B+C=180-60=120

now, adding,

B+C=120

B-C = 20

2B =240

or,B=120

now subtracting,

B+C=120

B-C = 20

2C. =100

or, C=50

so, B=120, C=50

Answer 2

Answer:

50 degree because 50 + 60+70=180

and 70-50=20