Find the area of abc. round your answer to the nearest tenth. b=87, a = 10.1, c = 9.8

1 answer:

8 0

The area of the triangle can be calculated through the equation,
A = sqrt ((s)(s - a)(s - b)(s - c))
where A is area, s is the semiperimeter ((a + b + c)/2), a, b, and c are the sides given above.

The presented equation above is the Heron's formula.

Substituting the known values,
s = (8.7 + 10.1 + 9.8) / 2
s = 14.3

A = sqrt ((14.3)(14.3 - 8.7)(14.3 - 10.1)(14.3 - 9.8))
A = 38.9 units squared

Thus, the answer to this item is not among the choices.

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Eva8 [605]

First it has a sign second 3 can be divided by 18. lastly 18 is greater than 3n

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Given: What type of angles are ∠2 and ∠3 are adjacent angles.

lubasha [3.4K]

The correct answer is: [D]: "supplementary angles, 180° " .
_____________________________________________________
Note:

Choices:
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[B]: "complementary angles, 180° " ; and:
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[C]: "supplementary angles, 90° " ;
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can automatically be ruled out ; since by definition:

→ Complementary angles always add up to 90° — NOT 180° ;
and: supplementary angles always add up to 180° — NOT 90° .
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Note: "Adjacent angles" refer to "supplementary angles" ; which, by definition add up to 180° . Futhermore, looking at the image provided,

we see that ∠1 and ∠2 are, in fact "adjacent" and that ∠1 and ∠2 comprise the entire portion of a "straight line" (being intersected by a transversal)" ;

and as such; ∠1 and ∠2 are supplementary angles—

and as such—add up to 180° .

(which rules out: Choice [A]: "complementary angles, 90°) ;

→ and demonstrates the correct answer:
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Answer choice: [D]: "supplementary angles, 180° " .
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2 years ago

Juan ha leído ya la quinta parte de un

OlgaM077 [116]

Answer:

I don't speak Spanish. It would be helpful if you could translate to English :)

Step-by-step explanation:

Question translated:

Juan has already read the fifth part of a

book. When I read 90 more pages, still

He will have half the book left. How many

pages does the book have? How many pages