Answer:
90°
Step-by-step explanation:
the sum of the 3 angles in a triangle = 180°
sum the parts of the ratio 10 + 3 + 7 = 20
divide 180 by 20 to find the value of one part of the ratio
[tex]\frac{180}{20}[/tex] = 9° ← 1 part of the ratio
the largest angle is the one with 10 parts of the ratio, hence
10 parts = 10 × 9° = 90° ← largest angle
