Angle MNO is 90, it’s just the top right corner
Answer:
b
Step-by-step explanation:
i just took it on edge
Answer:
point form: 
equation form: 
Step-by-step explanation:
First lets simplify both side of this equation.
2 + 7 + ♢ = 3 + 6 + 5
Subtract 9 from both sides of the equation.
9 + ♢ = 14
Answer (C)
♢ = 5
By definition, an isosceles triangle has 2 of the 3 sides with the same length. From this, we already know that the third side must be or 5 or 12.
We also know that, for every triangle, the sum of two sides must be always bigger than the third side, for any combination.
From this second affirmation, we know that the third side can not be 5, because:

From this, we conclude that the third side of an isosceles triangle with sides equal to 5 and 12 is equal to 12.