Answer:
angles in a triangle add up to 180°
5:12:13 = 30
180 ÷ 30 = 6
6 × 5 = 30°
6 × 12 = 72°
6 × 13 = 78°
angles = 30°, 72°, 78°
you need to start from the left upper corner
C is the answer, hope this helps!
It wouls be C since its property portions
The answer that you are looking for is 6.569
