2 years ago

______ lines are two lines that ibtersect at 90°.

Mathematics

2 answers:

Serga [27]2 years ago

6 0

Answer:

Step-by-step explanation:

Perpendicular lines

maxonik [38]2 years ago

6 0

A perpendicular intersects at a 90 degree angle

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3. A sign company is building a sign with the dimensions shown. What is the area, in square feet, of the sign? Round to the near

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Answer:

84.87sq ft

Step-by-step explanation:

Let ABC be the triangle and AD be the perpendicular on BC such that BD=DC=7ft.

Now, it is known that $\frac{DC}{AC}=cos60^{0}$

$AC=\frac{7}{\frac{1}{2}}$

$AC=7ft$

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$(AC)^{2}=(AD)^{2}+(DC)^{2}$

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Thus, area of the building is 84.87sq ft.

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