Explanation:
Let the 2 be X and Y.
Z is 3rd angle.
Z=2X
w.k.t Sum of angles in a triangle is 180°
Z+X+Y=180°
2X+90°=180°
2X=90°
=>X=45°
=>Y=90°-45°=45°
=>Z=2X=2(45°)=90°
Hope this helps you.
<h3>
B. True</h3>
"This was the idea that non-living objects can give rise to living organisms."
The vertical component is given by the sin of the angle. So this is 20*sin(53)=15.97m/s