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Rom4ik [11]
3 years ago
15

Find the area of a circle with a diameter of 4​

Mathematics
1 answer:
rusak2 [61]3 years ago
8 0

Answer:

12. 56

Step-by-step explanation:

The area of a circle is given by pi×r^2

where r is the radius. The question states That we should use 3. 14 in place of pi.

Area=3. 14×r^2

=3. 14×2^2

=3. 13×4

=12. 56

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((I will give brainy and 20 points to the first person who answers correctly!))
masya89 [10]
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3 years ago
Reflect B (2,7) over the y-axis
8_murik_8 [283]
Q: Reflect B (2,7) over the y-axis

Answer:
(-2,7)

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3 0
3 years ago
Having a hard time with this can someone answer pls
larisa [96]

The values of angles are 140 and 20

• In plane geometry, a figure which is formed by joining of two lines that share a common point is called as the angle. The two lines or rays are called as the sides of the angle and the common point is called the vertex.

• In geometry there are types of angles such as complementary angles, supplementary angles, acute angle, obtuse angles. Complementary angles are the angles whose sum is equal to 90. Supplementary angles are the angles whose sum is equal to 180.

According to the question

We are given that one angle is -7x and the other angle is -2x

Using formula of supplementary angles

-7x + (-2x) = 180

-7x -2x = 180

-9x = 180

-x = 20

x = -20

The value of x is -20

The value of angle – 7x = -7(-20) = 140

The value of angle -2x = -2(-20) = 40

Learn more about angles here

brainly.com/question/25716982

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