Can someone tell me how to do this and what’s the answer

answer:

a

step-by-step explanation:

answer:

a) a unique triangle

step-by-step explanation:

in this triangle you are given 2 angles of a triangle,

from this you can find the missing 3rd angle which is

180 - 30 - 40 = 110 degrees.

recall that with 3 angles (aaa) you can describe an infinite number of similar triangles (i.e different sized triangles that are the same shape).

however you are also given one of the sides. this effectively "freezes" the triangle at only one possible size.

hence it is a unique triangle.

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b

9 x 8 divided by (5-3)=36