Answer:
where is graph. Hope you understand mr
Step-by-step explanation:
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Help: All triangle have angles that add up to 180, for isosceles triangles 2 of the angles are the same 1 is different. You need to know at least 1 angle. A = Angle.
A times 2 - 180 = x
Two angles are the same 1 is gotten from the equation
Answer: 9 * (n + 1)
Explanation:
Nine times: multiplication
Sum: addition
n: the unknown variable
Answer:
b)0, yes
Step-by-step explanation:
Given:
Vectors (4,8) . (6,-3)
Finding inner product of vectors:
= 4x6 + 8x-3
=24-24
=0
Now to check the angle between them using formula a.b=|a|.|b|cosθ
|a|=
=8.9
|b|=
=6.7
Putting values of a.b=0 and |a|=8.9, |b|=6.7 in a.b=|a|.|b|cosθ we get,
0= 8.9(6.7)cosθ
cosθ =0
θ=90 degrees
Hence the two vectors are perpendicular !