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3 years ago

Please help me out :)

Mathematics

1 answer:

Katarina [22]3 years ago

3 0

Answer:

A = 25√3 cm²

Step-by-step explanation:

View 5√3 cm as being the height of an equilateral triangle whose base is at the bottom of the purple figure. To find the area of one such triangle, we use the area-of-a-triangle formula A = (1/2)(b)(h).

opp

Using the sine function sin Ф = --------

hyp

we find the length of the hypotenuse, which is also the radius of the octagon, and because this is an equilateral triangle, is also the length of the base:

√3 5√3 cm

sin 60° = -------- = ------------- , which produces the value of hyp:

2 hyp

√3 5√3 cm

-------- = ------------- , which produces the value of hyp:

2 hyp

√3·hyp = 10√3, or hyp = 10 cm

Then the area of this one triangle is A = (1/2)(b)(h), or

A = (1/2) (10 cm)(5√3 cm) = 25√3 cm²

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2 years ago

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grigory [225]

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Answer:

c = 2
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Step-by-step explanation:

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2 years ago

5. It is given that -2,4, a, b and care five consecutive terms of a geometric progression. Find the value of c.

vlada-n [284]

Answer:

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Step-by-step explanation:

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3 years ago

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Elodia [21]

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Step-by-step explanation:

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Hence, the correct answer is C. $0.75^4$ .

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3 years ago