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3 years ago

triangles ABC and ACD are right triangles. AB is 28 meters long. AC is 21 meters long. Find the lengths of BC and AD.

Mathematics

1 answer:

hichkok12 [17]3 years ago

4 0

Answer:

The length of BC = 18.52 m & AD = 28 m.

Step-by-step explanation:

Since Δ ABC & ΔACD are the right angles.

So BC = CD

From Δ ABC

$AB^{2} = AC^{2} + BC^{2}$

$28^{2} = 21^{2} + x^{2}$

$x^{2} = 784 - 441$

x = 18.52 m

Thus BC = x = 1852 m

CD = BC = 18.52 m

Now from the ΔACD

$AD^{2} = AC^{2} + CD^{2}$

$AD^{2} = 21^{2} + 18.52^{2}$

AD = $\sqrt{784}$

AD = 28 m

Therefore the length of BC = 18.52 m & AD = 28 m.

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a) $p_v =P(Z$

b) Since $p_v$ we can reject the null hypothesis at the significance level given. So based on this we can commit type of Error I.

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Previous concepts and data given

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$2.054=\frac{90-89}{\frac{0.8}{\sqrt{n}}}$

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triangles ABC and ACD are right triangles. AB is 28 meters long. AC is 21 meters long. Find the lengths of BC and AD.​

triangles ABC and ACD are right triangles. AB is 28 meters long. AC is 21 meters long. Find the lengths of BC and AD.