We have an angle, a hypotenuse - the ladder length - and we're looking for the opposite side......the sine seems the way to go, here.....
sin 65 = opp / 20 multiply both sides by 20
20 sin 65 = opp = about 18.13 ft up the wall
15: the red tiles are triangle, blue tiles are pentagons
Answer:
-5.44
Step-by-step explanation:
multiply add negative sign
Answer about 25
Step-by-step explanation:
Answer: Choice B
12.5 < x < 18.9
================================================
Explanation:
We have a triangle with these side lengths:
- a = 10
- b = 16
- c = x = unknown
Let's assume that b = 16 is the largest side of this triangle.
By the converse of the pythagorean theorem, we need
to be true in order for an acute triangle to happen.
So,

Now let's consider the possibility that the missing side x is actually the longest side.
Using the same theorem as before, we would say,

We found that x > 12.5 and x < 18.9
This is the same as saying 12.5 < x and x < 18.9
Put together, they form the approximate answer of 12.5 < x < 18.9