Which pairs of polygons are similar?

The trapezoids and the rectangles are similar

Step-by-step explanation:

we know that

If two figures are similar

then

The ratio of their corresponding sides is equal

We will proceed to verify each case

case A) Right triangles

------> is not true

therefore

the right triangles are not similar

case B) Isosceles triangle and equilateral triangle

Are not similar, because the first  is an isosceles triangle and the second is an equilateral triangle

case C) Trapezoids  

------> is true

therefore

the trapezoid figures are similar

case D) Rectangles

------> is true

therefore

the rectangles are similar

d. 8

step-by-step explanation:

the given radical expression is:

we can rewrite this as:

we express as square numbers to get;

the exponents will now cancel out to give.

the correct answer is d

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol