Without using your calculator, find the exact values of x and y in each diagram below. Homework Help S
b.
24
X
455
300x
8
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Answer:
[tex](a)\ x=18;\ y=9\sqrt{3}[/tex]
[tex](b)\ x=24\sqrt{2} ;\ y=24[/tex]
[tex](c)\ x=\frac{8}{3} \sqrt{3} ;\ y=\frac{16}{3} \sqrt{3}[/tex]
Step-by-step explanation:
(let the length of the leg = a)
[tex]hypotenuse=\sqrt{a^2+a^2}[/tex]
[tex]=\sqrt{2a^2}[/tex]
[tex]\boxed{hypotenuse=a\sqrt{2} }[/tex]
[tex]\boxed{\bf leg:hypotenuse=1:\sqrt{2} }[/tex]
(let the length of the short leg = a, then the hypotenuse = 2a)
[tex]hypotenuse=\sqrt{short\ leg^2+long\ leg^2}[/tex]
[tex]2a=\sqrt{a^2+long\ leg^2}[/tex]
[tex](2a)^2=a^2+long\ leg^2[/tex]
[tex]long\ leg =\sqrt{4a^2-a^2}[/tex]
[tex]long\ leg =\sqrt{3a^2}[/tex]
[tex]\boxed{long\ leg=a\sqrt{3}}[/tex]
[tex]\boxed{\bf short\ leg:long\ leg:hypotenuse=1:\sqrt{3} :2 }[/tex]
(a)
Given:
[tex]short\ leg:hypotenuse=1:2[/tex]
[tex]9:x=1:2[/tex]
[tex]x=9\times2[/tex]
[tex]\bf x=18[/tex]
[tex]short\ leg:long\ leg=1:\sqrt{3}[/tex]
[tex]9:y=1:\sqrt{3}[/tex]
[tex]y=9\times\sqrt{3}[/tex]
[tex]\bf y=9\sqrt{3}[/tex]
(b)
Given:
[tex]y=leg[/tex]
[tex]\bf y=24[/tex]
[tex]leg:hypotenuse=1:\sqrt{2}[/tex]
[tex]24:x=1:\sqrt{2}[/tex]
[tex]x=24\times\sqrt{2}[/tex]
[tex]\bf x=24\sqrt{2}[/tex]
(c)
Given:
[tex]short\ leg:long\ leg=1:\sqrt{3}[/tex]
[tex]x:8=1:\sqrt{3}[/tex]
[tex]x=8\div\sqrt{3}[/tex]
[tex]\bf x=\frac{8}{3} \sqrt{3}[/tex]
[tex]short\ leg:hypotenuse=1:2[/tex]
[tex]\frac{8}{3} \sqrt{3} :y=1:2[/tex]
[tex]y=\frac{8}{3} \sqrt{3} \times2[/tex]
[tex]\bf y=\frac{16}{3} \sqrt{3}[/tex]