find the value of X in each of the given triangles.

<DSR + <SRD + <RDS = 180° (Angle sum property)
2x + x +3x = 180°
6x = 180°
x = 180°/6
x = 30°
So, <SRD = x = 30°
<RDS = 3x = 3(30°) =90°
<DSR = 2x = 2(30°) = 60°
Hope it helps !
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Jai hind !
Answer:
[tex]3x + 2x + x = 180 \\ 6x = 180 \\ \boxed{x = 30}[/tex]
Angles are 30°,60° and 90°.