Answer: 
Step-by-step explanation:


The answer is 196.875 in3
<span>Assuming you meant the following measures
10 1/2 inches by 7 1/2 inches by 2 1/2 inches.
The volume is V = L*W*H = 10.5 in * 7.5 in *2.5 in = 196.875 in3</span>
Yeah so basically the answer is
Step-by-step explanation:
BOTH TRIANGLES ARE SIMILAR BY THE AA SIMILARITY POSTULATE.
In first triangle:
Remaining angle = 180° - (70° + 30°)= 80°
In second triangle:
Remaining angle = 180° - (80° + 30°)= 70°
Hence, all the angles of first triangle are congruent to the corresponding angles of the second triangle.
Thus, both the triangles are similar by
THE AA SIMILARITY POSTULATE