Answer:
A) 220.5 mm^2
Step-by-step explanation:
<u>Explanation</u>:-
Given A regular triangular pyramid has a base of area is 31.5mm^2
and also given surface area of triangular pyramid is 252 mm ^2
by using formula
surface area of regular triangular pyramid = base of area + half of lateral surface.

252 = 31.5 + 

220.5 = lateral area of triangular pyramid
lateral area of triangular pyramid = 220.5 mm^2
6/ 24 green
3/24 blue
2/24 yellow
total 11/24
13/24 left which is white
13 * 2 = 26 white
blue 4 *2 = 8
Answer: A
If its around the line and the dots are going the same way than its accurate.
The irrational numbers are √10,√27,√99.
I believe the points should be as follows : X, S, Y, and U.