Answer:
22.5 cm
Step-by-step explanation:
9 inches=9×2.5 cm =22.5 cm
The x coordinate of S will be 1/2 * 2a = a.
and since the half triangle is 30-60-90 the y coordinate will be sqrt3 a
so S is (a , sqrt3a)
Think these are the answers to the first few hope it helps