For $i=1,2,$ let $T_i$ be a triangle with side length $a_i,b_i,c_i,$ and area $A_i.$ Suppose that $a_1\le a_2, b_1\le b_2, c_1\le c_2,$ and that $T_2$ is an acute triangle. Does it follow that $A_1\le A_2$?
1. Let \( T_1 \) and \( T_2 \) be triangles with side lengths \( a_1, b_1, c_1 \) and \( a_2, b_2, c_2 \) respectively, and areas \( A_1 \) and \( A_2 \) respectively.
2. Given that \( a_1 \le a_2 \), \( b_1 \le b_2 \), \( c_1 \le c_2 \), and \( T_2 \) is an acute triangle.
3. We need to prove that \( A_1 \le A_2 \).

First, we rewrite the problem with different notations to avoid conflicts:
- Let \( T_1 \) be an arbitrary triangle and \( T_2 \) be an acute triangle.
- For \( i = 1, 2 \), let \( a_i, b_i, c_i \) be the side lengths of triangle \( T_i \).
- Suppose \( a_1 \le a_2 \), \( b_1 \le b_2 \), \( c_1 \le c_2 \).
- We need to prove that \( S_1 \le S_2 \), where \( S_i \) is the area of triangle \( T_i \) for \( i = 1, 2 \).

Proof:
1. Let \( A_i, B_i, C_i \) be the angles of triangle \( T_i \) for \( i = 1, 2 \).
2. Since the angles of the triangles \( T_1 \) and \( T_2 \) have the same sum, we have \( A_1 + B_1 + C_1 = 180^\circ \) and \( A_2 + B_2 + C_2 = 180^\circ \).
3. There is at least one angle of triangle \( T_1 \) which is less than or equal to the corresponding angle of triangle \( T_2 \). Without loss of generality, assume \( A_1 \le A_2 \).

Since \( T_2 \) is an acute triangle, we have \( A_2 \le 90^\circ \). Given \( A_1 \le A_2 \), it follows that \( A_1 \le 90^\circ \) as well.

4. The function \( f(x) = \sin x \) is monotonically increasing on \([0^\circ, 90^\circ]\). Therefore, since \( A_1 \le A_2 \), we have \( \sin A_1 \le \sin A_2 \).

5. Using the formula for the area of a triangle, we have:
   \[
   S_1 = \frac{1}{2} b_1 c_1 \sin A_1
   \]
   and
   \[
   S_2 = \frac{1}{2} b_2 c_2 \sin A_2.
   \]

6. Given \( b_1 \le b_2 \), \( c_1 \le c_2 \), and \( \sin A_1 \le \sin A_2 \), we can conclude:
   \[
   S_1 = \frac{1}{2} b_1 c_1 \sin A_1 \le \frac{1}{2} b_2 c_2 \sin A_2 = S_2.
   \]

Thus, we have shown that \( A_1 \le A_2 \).

The final answer is \( \boxed{ A_1 \le A_2 } \).