The ladder - RT

The ladder 16 feet reaches up 14 feet on a house wall. The 90-degree angle at the base of the house and wall. What are the other two angles or the length of the leg of the yard?

Correct answer:

b =  7.746 ft
A =  61.045 °
B =  28.955 °

Step-by-step explanation:

$$\begin{gathered} c=16\text{ft} \\ a=14\text{ft} \\ b=\sqrt{c^2-a^2}=\sqrt{16^2-14^2}=2\sqrt{15}=7.746\text{ft} \end{gathered}$$

$$\begin{gathered} \sin A=a:c \\ A=\frac{180°}{\pi }\cdot \arcsin (a/c)=\frac{180°}{\pi }\cdot \arcsin (14/16)=61.045^{\circ }=61°2^{\prime }42" \end{gathered}$$

$B=90-A=90-61.045=28.955^{\circ }=28°57^{\prime }18"$

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