Answer:
We need to sketch the problem first.
Find the size of angle R.
One member travels a distance of 12km due north. Another team member heads 50degree east of north and travels a distance of 10km.
If se substute 50° of 180 we have
180-50=130°
The distance between the two team members is the missing side.
We know two sides and included angle, so we use the cosine rule.
A2+b2+c2-2bcCosA
= 102+122-(2x10x12xcos130°)
=100+144-(-147.08)
=100+144+147.08
=391.08
A==SQRT391.08
=19.775
19.7km
Step-by-step explanation:
Answer:
Yes, because it has one pair of parallel sides.
Step-by-step explanation:
Answer:
i don't know I don't have ideas
Answer:
12
Step-by-step explanation:
I think I haven't learned this yet If I did I forgot but sorry if wrong
Answer:
I'm pretty sure it's substitution.
Step-by-step explanation:
