caculate all angles of triangle abc if 3times angleb=4 times angle c and angle a =3/7 timesexterior angle a.
caculate all angles of triangle abc if 3times angleb=4 times angle c and angle a =3/7 timesexterior angle a.
deepti , 6 Years ago
Grade 11
7 grade maths> caculate all angles of triangle abc if 3t...
2 Answers
Arun
Dear student
A = 3(180 - A)/7
10A = 3*180
A = 54°
Now B +C = 180 - 54 = 126°
B = 4C/3
Hence 4C/3 + C = 126°
7C/3 = 126°
C = 54°
And B = 4C/3 = 72°
Approved Last Activity: 6 Years ago
Yashraj
it is a esy question just make equation anduse sum of all angles of triangle is 180 degrees
A = 3(180 - A) divided by 7
A = 54°
we know B +C = 180 - 54 = 126°
B = 4C/3
so
4C/3 + C = 126°
C = 54°
And B = 4C/3 = 72°
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