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3 years ago

What is the circumference of 26 cm

Mathematics

2 answers:

IgorC [24]3 years ago

5 0

Answer:530.9

Solution Steps:

Area of a circle in terms of radius:

Area = π . r2 = 3.14 × 132 = 530.9 square cm.

In terms of diameter:

Area = π . (d/2)2 = 3.14 × (26/2)2 = 3.14 × (13)2 = 530.9 square cm.

In terms of circumference:

Area = C2/(4π) = 81.682/4π = 6671.62/(4 × 3.14) = 6671.62/(12.56) = 530.9 square cm.

Note: for simplicity, some results may be rounded to nearest hundredth and π was rounded to 3.14. See formula details below in this page.

A circle of radius = 13 or diameter = 26 or circunference = 81.68 cm has an area of 530.9 square centimeters which is equal to:

5.309E-8 square kilometers (km²)

0.05309 square meters (m²)

1.312E-5 acres (ac)

5.309E-6 hectares (ha)

2.05E-8 square miles (mi²)

0.0635 square yards (yd²)

0.5715 square feet (ft²)

82.29 square inches (in²)

Formulae:

Step-by-step explanation:

Dominik [7]3 years ago

4 0

Answer:

So they cirumference od 26 is C= $\pi$ xD.

C=81.7cm

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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Keywords: equation, problem solving, word problem

Learn more about system of equation from brainly.com/question/14280085

#learnwithBrainly

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4 years ago

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Please help? Will make you the Brainliest!

Allushta [10]

Answer:

D. 19/2 D.-4/ $\sqrt{15}$ D.cos^2x look at explanation for last one

Step-by-step explanation:

1. Find the value of sec if cos delta = 2/19

because sec is basically 1/cos, and since it's Quad I there's nothing weird, you can just flip the fraction

therefore it's D. 19/2

2. Find the value of csc given cos delta = -1/4 and triangle is in third Quad

so cosine is adj over hypo: since the hypo can't ever be negative, the triangle must have a = -1 and c =4. to find bc use the c^2 = a^2 + b^2 to solve for b^2, and since it's third quad, b is negative, so b = - $\sqrt{15}$ 2. NOw that you know all three sides, finding csc is ez. So csc is hypo over opposite bc its opposite of sine, so therefore csc delta = $-4/\sqrt{15}$

3. simplify sin^2qcot^2

ok, so if cot is opposite of tan, and tan is sine over cos, cot must be cos over sine :D! SO cot^2 = $\frac{cos^2x }{sin^{2}x}$ . multiply that by sin^2 and the sines will cancel, leaving you with just cos^2x! sorry, I used x insead of q out of habit... oops!

4. determine the quad if sine delta = -1/4

sine is opposite over hypo, and as mentioned before, hypo can't equal to negative, so the opposite side must be negative. therefore, the triangle must lie in quad III or quad IV

ahem, these are your answers, idk why is it all D lol, I hope this helped. sorry this was so long!

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