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NISA [10]
3 years ago
11

Proper angle for a ladder is about 75° from the ground. Suppose you have a 10 foot ladder. How far from the house should you pla

ce the base of the latter? Round to the nearest hundredth
Mathematics
1 answer:
Alja [10]3 years ago
8 0

Answer:

The base of the ladder is 2.58 m.

Step-by-step explanation:

Given that,

The angle of elevation for a ladder from the ground is 75°.

The length of a ladder, H = 10 foot

We need to find the distance from the house should you place the base of the latter. Let the base of the ladder is b. Using trigonometry,

\cos\theta=\dfrac{B}{H}\\\\B=H\times \cos\theta\\\\B=10\times \cos(75)\\\\B=2.58\ m

So, the base of the ladder is 2.58 m.

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If the perpendicular bisector of one side of a triangle goes through the opposite vertex, then is the triangle isosceles?
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Answer:

True

Step-by-step explanation:

The perpendicular bisector of the opposite side to the vertex bisects the angle at the vertex into two equal parts and also bisects the triangle into two equal parts.

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Since this half triangle is a right-angled triangle, the third angle in it is 90.

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subtracting 90 from both sides, we have

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subtracting B from both sides, we have

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multiplying through by 2, we have

A = 2(90 - B)

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Since A = 180 - 2B, then our triangle is an isosceles triangle.

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3 years ago
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3 years ago
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