1. THS and GFH is similar because they both have a 61 degree angle and a 90 degree angle known. Meaning the third unknwn angle would equal, being 29 degrees.
2. x=sqrt(63)=3*sqrt(7)
3. The two triangles are similar since they share two sides and their hypotneus are parallel, meaning their sides should be in proportions. 10/(3x+4) = 8/(3x-1) using cross multiplication 30x -10 = 24x + 32. Answer x=7.
