Triangle J'K'L' shown on the grid below is a dilation of triangle JKL using the origin as the center of dilation: Two triangles are drawn on a grid. First triangle has vertices J 8 and 12, K 4 and 8, L 12 and 6. Image triangle has vertices J Please help! Will give brainliest! Which scale factor was used to create triangle J'K'L'? A) 4 B) one fourth C) 2 D)one half

D. one half

Step-by-step explanation:

The height of the triangle JKL is 5 units. The height of the triangle J'K'L' is 2.5 units.

The scale factor used to create the triangle was one half.

5 × 1/2 = 2.5

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: