Question

Please can u help me with geometry work !!!

Answer 1

The first one can be done by Pythagoras theorem such as $12^2=9^2+x^2$ then $x^2=63$ then $x= \sqrt{63}$

The second one can also done by Pythagoras theorem, note that this is isosceles triangle so $y=z$, again by using Pythagoras theorem $15^2=y^2+z^2=y^2+y^2 or =z^2+z^2$ then $225=2y^2$ then $y= \sqrt{\frac{225}{2} }$

For the last one  can also done by property of 30-60-90 triangle. $w=8 \sqrt{3}$$k=2.8=16$