Answer:
right triangle
Step-by-step explanation:
Notice it has a right angle (90º) in its corner. Therefore, it is a right triangle.
Right triangles look like this: ⊿
Answer:
85
Step-by-step explanation:
<em>The equation for the discriminant is </em>
b^2-4(a)(c)
<em>Plug your numbers in from the equation. </em>
<em>1=a, -7=b, -9=c</em>
<em />
(-7)^2-4(1)(-9)
49-(-36)
49+36
85
B= (v/a^2)-5 should be correct.
Fine the length BC using the cosine law. Google the law and sub it in
