7. C
8.A. sqrt(144)
^^^^^^^^^^^^^^^^^^
30 students could of been taking both courses and 60 with no course
The equation of a circumference is 2
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r. Since we know that r=17, we plug that into the formula, and get an answer of C. 34
Answer:
That would be the side-side-side (SSS) postulate, which states that if all the sides of a triangle are in a fixed ratio to all the corresponding sides of another triangle, then the two triangles are said to be congruent.
Step-by-step explanation:
Looking at triangles ABC and DEF, we notice that:

since

Let me know if you have further questions.
Answer:
Theta=1.57rad, 4.71rad, 0rad, 2π rad, π rad and –π rad