+0  
 
0
93
1
avatar

If the angles of a triangle are 12 13 and 15.9 what are the angles

 Jun 25, 2020
 #1
avatar
0

I assume 12, 13 and 15.9 are the sides of the triangle. If that is the case, then the angles are found using the Law of Cosines:

 

Acute scalene triangle.

Sides: a = 12   b = 13   c = 15.9

Area: T = 76.535
Perimeter: p = 40.9
Semiperimeter: s = 20.45

Angle ∠ A = α = 47.777° = 47°46'39″ = 0.834 rad
Angle ∠ B = β = 53.346° = 53°20'44″ = 0.931 rad
Angle ∠ C = γ = 78.877° = 78°52'37″ = 1.377 rad

 Jun 25, 2020

7 Online Users