Question

The diagram shows the side view of a garden ladder BE Which dimension is closest to the height of the laddar a féct? O O 10.5 0 0 15.5 21 O O 20.3​

Answer 1

20.3

Explanation:

From the image, we can clearly see that the two triangles are actually right triangles. They have a hypotenuse l of 21 ft. and a base b of 5.5 ft. So by applying the Pythagoreans formula we get height h,

`l^2 = b^2 + h^2\\\implies h = √(l^2 - b^2)\\= √(21^2 - 5.5^2)\\= 20.3\\`

So the height is 20.3 ft.