- Shape NOPR is a parallelogram so that means lines NR and OP are parallel.
- If those lines are parallel, then angle R and angle P are equal. So angle P = x.
- If angle R and angle P are equal then triangle QOP is half of triangle MNR, because triangle MNR base angles are both x.
- You can imagine a line straight down the middle of triangle MNR to create a perpendicular angle, and since the two base angles are both x then triangle MNR is basically just two of triangle QOP.
1. Not sufficient
...
- If those lines are parallel, then angle R and angle P are equal. So angle P = x.
- If angle R and angle P are equal then triangle QOP is half of triangle MNR, because triangle MNR base angles are both x.
- You can imagine a line straight down the middle of triangle MNR to create a perpendicular angle, and since the two base angles are both x then triangle MNR is basically just two of triangle QOP.
1. Not sufficient
...
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