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Elenna [48]
3 years ago
13

Find the area of a circle with a diameter of four

Mathematics
2 answers:
Elis [28]3 years ago
7 0

Answer:

12.57

Step-by-step explanation:

the formula for the area of a circle is \pi r^{2}

the diameter is 2 times the radius, so dividing it by 2 gives you a radius of 2

substitute the 2 for the r in the formula and solve

\pi 2^{2}

4\pi

≈12.57

Furkat [3]3 years ago
5 0

Answer:

A = 12.56637

Step-by-step explanation:

A = \pi  * r^2\\\pi = 3.14159

r = diameter / 2\\4 / 2 = 2

A = 3.14159 * (2^2)

= 12.56637

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3 years ago
PLEASE HELP!!<br><br> which graph represents the function f(x) = -|x| - 2
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Answer:

The graph on the far right

Step-by-step explanation:

The negative in front of the absolute value indicates that the parent function |x| has been reflected over the x-axis and points downwards. The negative 2 being added to this portion shows that there has been a vertical shift of two units downwards as well. Therefore, the graph on the far right is the correct graph.

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2 years ago
Triangles triangle ABC and triangle DEF are similar. Find the angles of these triangles if Mesurements of angle A=100 degrees, a
beks73 [17]

Answer:

<D = 100

<E =30

<F =50

Step-by-step explanation

Given that triangles triangle ABC and triangle DEF are similar, this means that their angles are congruent i.e

<A = <D

<B = <E

<C = <F

Given

<A = 100 then <D = 100

<B = 30°, then <E = 30°

To get <F, we will use the expression

<D+<E+<F = 180 (sum of angles in a triangle is 180°)

100+30+<F = 180

130+<F = 180

<F = 180-130

<F = 50°

Hence the measure of <F is 50°

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