Answer:
146.41
Step-by-step explanation:
third order determinant = determinant of 3×3 matrix A
given ∣A∣=11
det (cofactor matrix of A) =set (transpare of cofactor amtrix of A) (transpare does not change the det)
=det(adjacent of A)
{det (cofactor matrix of A)} ^2 = {det (adjacent of A)}
^2
(Using for an n×n det (cofactor matrix of A)=det (A)^n−1
)
we get
det (cofactor matrix of A)^2 = {det(A) ^3−1
}^2
=(11)^2×2 = 11^4
=146.41
(2 × (6cm x 9cm)) + (2 × (6cm x 5.1cm)) + (2 × (9cm x 5.1cm)) = 261 square cm
Answer:
The answer is 106
Step-by-step explanation:
angle B is equal to angle D
so do 91 + 15= 106
and the math at angle D is x - 15
hope this helps! :D
Answer:
°
Step-by-step explanation:
The sum of all the three angles of any triangle is 180°
Putting sum of all the angles given equals to 180°

°
°
°

°
The value of the x is found on solving the given angles of the triangles.
Answer:
72
Step-by-step explanation:
there is 180 degrees in a triangle