3 years ago

What’s the value of Y? What’s the measure of angle A? What is the measure of arc DAB

Mathematics

1 answer:

Svet_ta [14]3 years ago

4 0

Answer:

1. 9

2. 9

3. 101

Step-by-step explanation:

hope it helps:)

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An equilateral triangle has a perimeter of 48 cm. What is the area?

KiRa [710]

Answer:

$A=64\sqrt{3}\ cm^2$

Step-by-step explanation:

we know that

An equilateral triangle has three equal sides and three equal interior angles (each interior angle measure 60 degrees)

The perimeter is equal to

$P=3b$

where

b is the length side of the equilateral triangle

we have

$P=48\ cm$

substitute

$48=3b$

solve for b

$b=48/3\\b=16\ cm$

Find the area

The formula of area applying the law of sines is equal to

$A=\frac{1}{2}b^2sin(60^o)$

substitute the value of b

$A=\frac{1}{2}(16)^2sin(60^o)$

$sin(60^o)=\frac{\sqrt{3}}{2}$

$A=\frac{1}{2}(16)^2(\frac{\sqrt{3}}{2})$

$A=64\sqrt{3}\ cm^2$

6 0

3 years ago

Which is the best estimate for the area of the figure above?

nekit [7.7K]

Answer:

So I'd say 20in^2 or 22in^2.

Step-by-step explanation:

I decided to make it into a full pentagon shape to just estimate.

So a pentagons sides are all equal so I counted the amount in boxes on the sides of the regular shape and most of them would be 3.5 if you changed the shape into a pentagon.

And I got:

--> 21.076

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3 years ago

Read 2 more answers

Line segment CD is congruent to line segment XY. Which of the following is an equivalent statement?

ohaa [14]

The one you have highlighted is correct, that is the sign for congruent.

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3 years ago

Which is the correct graph for * y> 2х – 4 А) ОА Ос

user100 [1]

Answer:

your answer would be OA

Step-by-step explanation:

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3 years ago

What does 13m2n3p + 21mp2 equal when completely factored?

nekit [7.7K]

Your question factored out would be 13mn^3 + 21p

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3 years ago