A victim has been shot in their car. Investigators perform a Greiss test around the bullet holes. What are investigators most likely hoping to learn from this test?

The exact time the bullets were fired
The caliber of the gun used
How far away the bullets were fired
The size of the bullets fired

The answer is A, the exact time the bullets were fired.

Explanation:

It’s a chemical test so they must be examining the chemistry around the bullet.

if triangle abc is congruent to triangle def, their interior angles are congruent, because congruent parts of congruent triangles are congruent (cpctc).

that means ∠d is congruent to ∠a; ∠d is equal to 8x - 2.

interior angles of all triangles add to equal 180 degrees, so you can set the sum of these interior angle values equal to 180 and solve for x.

180 = (8x - 2) + 22 + 72

180 = 8x - 2 + 22 + 72

180 = 8x + 92

88 = 8x

11 = x

x = 11