Answer: 
Step-by-step explanation:
Given
The point C 
is rotated 
clockwise about the origin
If a point is rotated about the origin, then the sign of the co-ordinates changes without changing the order of coordinates.
So,C becomes C' after the rotation.
x = 40/2 = 20 i think thsts the answer if I was wrong you have to right to slap my face
Answer:
178.3 mm²
Step-by-step explanation:
Surface area = Base area + 3 x side triangles area
Sₐ = 43.3 + 3 x (1/2 x (10 x 9)) = 43.3 + (3 x 45) = 178.3
I will help, what is your book called?
