Whlch equation shows the correct measure of angle ABD?
D
At
49°
с
B
A-180° - 49° = 131°
B-180° + 49° = 229
C-90° - 49° = 41°
D-90° + 49° = 139°

the answer will be the last one

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!