Answer:
101) A
102) 80 degrees
Explanation:
101)
On number 101, just cross multiple on all choices and then compare.
A) x/y=w/z
Cross multiply: xz=yw
B) w/y=x/z
Cross multiply: wz=xy
C) x/w=z/y
Cross multiply: xy=wz
D) (zw)/(xy)=2/2
Cross multiply: 2zw=2xy
Divide both sides by 2: zw=xy
Therefore A is the only proportion not equivalent to the others.
102)
We are given the angles are 2x,3x, and 4x. W also know these angles will add to be 180 degrees since we have a triangle.
2x+3x+4x=180
Combine like terms:
9x=180
Divide both sides by 9:
x=20
So the angles are:
2x=2(20)=40
3x=3(20)=60
4x=4(20)=80
The larger is 80.