Join all 3 points D, E, F, forming the triangle DEF.
Let the midpoint of EF be M and the midpoint of ED be N. (first picture)
Join point I to E, D and F.
Since IN is both an altitude and median to triangle EID, then triangle EID is an isosceles triangle, and IE=ID
similarly, we see that IE=IF.
conclusion: IE=ID=EF.
so O is the center of the circle with radius IE(=ID=EF)
Answer:
Your answer is 14
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Answer:
108
Step-by-step explanation:
Square of 9 = 9×9 = 81
Cube of 3 = 3×3×3 = 27
So sum of square of 9 & cube of 3 = 81+27 = 108
Answer:
A. The amount per text message.
B. 16x x y = 3.20
Step-by-step explanation:
A. the amount per text message doesn't change, only the amount of times you message does.
B. (below)
X- The amount of messages sent.
Y- The amount of months.