So... hmmm if you check the first picture below, for 2)
we could use the proportions of those small, medium and large similar triangles like

now.. for 3) will be the second picture below
The answer is D because when you put the missing value which is x you replace it to 10 and then you solve it I hope this helps
Answer:
Its 142
Step-by-step explanation:
Theres a website called triangle calculator and you put in three things wether its SSA or ASA or whatever and it gives you all the measurements. Good luck on your quizzes and tests :)
Answer:
1
Step-by-step explanation:
2^−1 + 2^−1
2x2^-1
1