Question

e) The angles of a triangle are (x + 5), (x + 10) and (x + 15)°. Find the
value of x, then find the actual sizes of the angles.​

Answer 1

we know that sum of angles of a triangle is 180

Therefore,angle A+angle B +angle c =180

so,(x+5)+(x+10)+(x+15) =180

3x+30 =180

3x =180-30

3x =150

x =150÷3

x =50

so the angels of a triangle are

angle A =(x+5)=(50+5) =55

angle B=(x+10)=(50+10)=60

angle c=(x+15)=(50+15)=65