Heads will come up when you draw the two headed coin 1/2 This 1/2 is for the draw. You have certainty of getting heads from this coin.
On a fair coin, probability of drawing the coin is 1/2
The probability of getting heads is 1/2
The probability is 1/2 * 1/2 = 1/4 with this coin
The total probability = 1/4 + 1/2 = 3/4 or 0.75 of getting heads.
Therefore the probability of drawing the 2 headed coin is 1/2 // 3/4
0.5 / 0.75 = 0.666666
<h2>Scalene is the correct answer</h2><h2></h2><h3>(Assuming you mean side lengths when you say 3, 8, 12.)</h3><h3></h3><h3><em>Please let me know if I am wrong.</em></h3>
Vertical because the interior angles of vertical angles are congruent.
