1. A Pentagon has interior angles of 70°, 130°, 115° and 110°. What is the measure of the 5th angle? 2. What is the name of a triangle whose interior angles are 45°, 45° and 90°?

3. What is the measure of an exterior angle adjacent to a 75° interior angle?

#2 is isosceles

#3 is 105°

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

step-by-step explanation:

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