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Dafna1 [17]
2 years ago
5

Last question for the day :)

Mathematics
2 answers:
Marat540 [252]2 years ago
5 0

Answer:

26 cm

Step-by-step explanation:

Please give me brainliest ;)

Lady_Fox [76]2 years ago
3 0
The answer is 26 cm





Answer
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Trigonometry
Natasha_Volkova [10]

Answer:

Step-by-step explanation:

For a triangle the area is

A=\frac{1}{2}bh

If our triangle is isosceles and the 2 congruent sides each measure 4 and they include an angle of 40 degrees, let's say that the vertex angle is 40 and the sides that are not the base each measure 4.  If we drop an altitude from the vertex to the base, we cut the triangle into 2 right triangles, with the vertex angle being 20 degrees and the hypotenuse being 4.  To find the base, then, which is opposite the angle, we use the sin ratio:

sin(20)=\frac{b}{4} and

4sin(20) = b so

b = 1.368

But we need the whole base, and that is only half of it.  So

2b = 2.736

To find the height, which is adjacent to the angle, we use the cos ratio:

cos(20)=\frac{h}{4} and

4cos(20) = h so

h = 3.759

Now we have enough info to find the area of the triangle using the triangle area formula from above:

A=\frac{1}{2}(2.736)(3.759) and

A = 5 meters squared.

7 0
2 years ago
Math 64 times40 eaquels 2.56
UkoKoshka [18]

Answer:

Wrong. It equals 2560.

Step-by-step explanation:

<h2><u><em>PLEASE MARK AS BRAINLIEST!!!!!</em></u></h2>
4 0
2 years ago
Jennifer has 3 brothers. Mark is older than Jennifer, but he is not the oldest.
Elza [17]
Jennifer I would say
8 0
3 years ago
Really need help Pls
Studentka2010 [4]

Answer:

20.57 cm

Step-by-step explanation:

Circumference of half circle = diameter + half of circumference

                                               = 8 +\dfrac{2\pi r}{2}\\\\\\= 8 + \pi r\\\\= 8 + 3.142 * 4\\\\= 8 + 12.568\\\\= 20.568\\\\= 20.57 \ cm

6 0
2 years ago
7 1/6 divided by 5/9
marshall27 [118]
215/54      i hope that helped you bye thanks 
7 0
3 years ago
Read 2 more answers
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