Carla looks from a height of 15 yards at the top of her apartment building. She lines up the top of a flagpolewith the curb of a street 20 yards away. If the flagpole is 12 yards from the apartment building, how tall is theflagpole? (G.SRT.B.5)

The flagpole is 6 yards tall
Explanations:The height of Carla from the ground, H = 15 yards
Distance between the curb and the buiding, D = 20 yards
The larger triangle is shown below:
A diagram representing the smaller triangle is shown below:
Since She lines up the top of a flagpole with the curb, the two triangles are similar and the ratio of corresponding sides will be equal
Therefore:
15/x = 20/8
20x = 15(8)
20x = 120
x = 120/20
x = 6
The flagpole is 6 yards tall