1) Triangular pyramid
2) A cone
3) I don't have the picture of the figure so I don't know
The answer is in the picture. Click on it
Answer:
77
Step-by-step explanation:
For the first part remember that an equilateral triangle is a triangle in which all three sides are equal & all three internal angles are each 60°. <span>So x-coordinate of R is in the middle of ST = (1/2)(2h-0) = h
And for the second </span><span> since this is an equilateral triangle the x coordinate of point R is equal to the coordinate of the midpoint of ST, which you figured out in the previous answer. Hope this works for you</span>
S=18€/5= 11.31 is the best option
