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Alex
3 years ago
6

A. Multiply the radius by 2 to find the diameter. b. Multiply the diameter by π. c. Measure the radius of the lid. Which is the

correct order to find the circumference of a circular lid?
Mathematics
1 answer:
Nimfa-mama [501]3 years ago
7 0

Answer:

The Correct order to calculate the circumference of a circular lid

1 )  Measure the radius of the lid.

2 ) Multiply the radius by 2 to find the diameter.

3 ) Multiply the diameter by π.

Step-by-step explanation:

Circumference :

In geometry, the circumference (from Latin circumferens, meaning "carrying around") of a circle is defines as the linear or Circular distance around it.

It is  given by the formula:

Circumference= \pi d

d =Diameter = 2\times Radius

The Correct order to calculate the circumference of a circular lid

1 )  Measure the radius of the lid.

Radius will be measured

2 ) Multiply the radius by 2 to find the diameter.

Diameter = 2 × Radius

3 ) Multiply the diameter by π.

π × Diameter = Circumference

Then we will get the Circumference,

Circumference= \pi\times d

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Step-by-step explanation:

b is per the identity of angles on parallel lines when intersected by one inclined line the same as the 40° angle.

so,

b = 40°

due to the parallel nature of the 2 lines there is a symmetry effect for such shapes inscribed a circle. the upper and the lower triangle must be similar. and when applying a vertical line through the central crossing point, everything to the left is mirrored by everything on the right.

so, angle c must be equal to angle b.

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and as the sum of all angles in a triangle is always 180°, d is then

d = 180 - 40 - 40 = 100°

the interior angle of the arc angle a is the supplementary angle of d (together they are 180°), because together with d they cover the full down side of the top-left to bottom-right line.

interior angle to a = 180 - 100 = 80°

due to the symmetry again, the arc angle opposite to a is the same as a.

as we know, the interior angle to a pair of opposing arc angles is the mean value of the 2 angles.

so, we have

(a + a)/2 = 80

2a/2 = 80

a = 80°

there might (and actually should) be some more direct approaches for "a" out of the other pieces of information, but that was the most straight one right out of my mind, and I don't spend time on finding additional shortcuts, when I have already a working approach.

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