Question

In the given triangle the value of $x$ is

• A. ${55}^o$
• B. ${110}^o$
• C. ${60}^o$
• D. ${30}^o$

Answer 1

The correct option is C ${60}^o$

$x+\left(x+{30}^0\right)+{30}^0={180}^0$ ( by an angle sum property)

$=2x+{60}^0=180$

$=2x={180}^0-{60}^0$

$=2x={120}^0$

$=x={60}^0$