Which pairs of triangles MUST be similar? a. Triangles 1 and 2 each have one angle in common.
b. Triangles 3 and 4 are both isosceles. They each have a 60 degrees angle.
c. Triangles 5 has a 20 degrees angle and a 100 degrees angle. Triangle has a 20 degrees angle and a 60 degrees angle.
d. Triangle 7 has a 70 degrees angle and a 25 degrees angle. Triangle 8 has a 50 degrees angle and a 105 degrees angle.

B. 3&4 are isosceles.

Step-by-step explanation:

Not 100% sure, just kind of makes sense

Answer is b

Step-by-step explanation:

The triangles are equal considering the congruency ASA

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(x3 + 6x2 + 2x - 6) • (x - 1)

step-by-step explanation:

polynomial long division :

3.2     polynomial long division

dividing :   x4+5x3-4x2-8x+6

                              ("dividend")

by         :     x-1     ("divisor")

dividend     x4   +   5x3   -   4x2   -   8x   +   6

- divisor   * x3     x4   -   x3            

remainder         6x3   -   4x2   -   8x   +   6

- divisor   * 6x2         6x3   -   6x2        

remainder             2x2   -   8x   +   6

- divisor   * 2x1             2x2   -   2x    

remainder               -   6x   +   6

- divisor   * -6x0               -   6x   +   6

remainder                     0

quotient :   x3+6x2+2x-6   remainder:   0

17

step-by-step explanation: