Hello,
I am having trouble with the following problem. I don't understand how angle QPR is sufficient to answer the question. Please enlighten me :shock:
tpajo Wrote:Sorry, maybe I'm missing something, just came across this same problem. I understand the exterior angle rule as stated, but in this case, we're only being given one of the angles that we need to add up to find PRS, aren't we? If I understand the exterior angle rule, correctly, then PRS=PQR+QPR.
In the problem, we're given the measure for only one of them (QPR) in 1, so how is that alone sufficient to find the answer?
Similarly, in 2, we're given the sum of two angles that allow us again to determin that QPR=30 degrees, but I don't see how we're able to find out what PQR is? Help?
jaskarann Wrote:Thank you Ron, your explanations are fantastic!
tarn07 Wrote:Not gonna lie, this one is really frustrating me. I full understand how to solve this using Ron's method, but how are some of you solving this using the exterior angle method?
Can I please get a step-by-step breakdown of how to solve this using the exterior angle method, talk me down like I'm 5 :).
as an aside, you will never actually NEED the exterior angle theorem to solve a problem; it's just a shortcut that will save you approximately 10-15 seconds when it can be employed.
cokimvu Wrote:I kept looking for a number for PQR to subract from when I only needed to know the difference.