Answer:
D: EF = 21
Step-by-step explanation:
3*3 = 9
so 7*3 = 21
If EF is 21, then it is proportionate, which shows that the two triangles are similar, and you can use SAS to say this!
Hope this helped!! :)
Answer:
D- EF=21
Step-by-step explanation:
SAS is when an angle of a triangle and the two sides adjacent to that angle is congruent to the other triangle's angle and adjacent two sides.
This means that since the angle in the smaller triangle is angle A, and the adjacent sides are 3 and 7, the congruent angle in the other triangle is E, and we only know one of the two adjacent sides; 9. So, to find the other side, we can use ratios. Since we need to prove that the triangles are similar, let's say that the triangles are similar, and use ratios. The side proportional to side CA is GE, and you multiply 3 by 3 to get 9. So, we multiply side AB's length, 7, by 3 to get the side proportional to it, EF. 7*3=21.
