The diagram shows a 12 cm * 3 cm * 4 cm cuboid. Find angle GEC. Give your answer to 1 decimal place.

m<GEC = 17.9 deg

Step-by-step explanation:

First, use the Pythagorean theorem to find the length of GE.

(GE)^2 = (E?)^2 + (?G)^2

I am using ? in place of the front right corner point name that is not visible.

(GE)^2 = 12^2 + 3^2

GE = 12.3693

In triangle EGC, for angle GEC, GE is the adjacent leg, and GC is the opposite leg. We use the tangent.

tan GEC = opp/adj

tan GEC = GC/GE

tan GEC = 4/12.3693

tan GEC = 0.32338

Use inverse tangent to find the angle.

m<GEC = 17.9 deg

3x + 4y -25 =0 represents the amount of change sianna should recieve