100 points and brainliest if answered correctly, prove that the sum of the measures of the interior angles of a triangle is 180°. be sure to create and name the appropriate geometric figures

Remember that a triangle is 1/2 of a square. A square has 4 interior angles, which are all exactly 90 degrees (if they were not all 90 degrees, it would not be a square). 90 x 4 = 360. So if a square / 2 = a triangle, then the interior angles of a square / 2 = the interior angles of a triangle.

360 / 2 = 180.

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!

10 down (bang1)

5 up

5down (2)

2.5 up

2.5 down (3)

1.25 up

1.25 down (4)

now add them up : )

hoped i lol