Question

Find the values of the angles $x,y$ and $z$.

Answer 1

From the figure it is clear that,

${40}^o+x+{25}^o={180}^o$

or, $x={115}^o$.

Again,

${40}^o+y={180}^o$

or, $y={140}^o$.

Also, $x+{25}^o+z={180}^o$ [ Since $x={115}^o$]

or, $z={40}^o$.