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tekilochka [14]
3 years ago
13

I need help please ASAP

Mathematics
1 answer:
grin007 [14]3 years ago
6 0
I’m pretty sure it is the first one
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Please help!!!!!!!!!!
Gnoma [55]

Answer:

The surface of the prism is 84m²

Step-by-step explanation:

You have 4 figures here (two the same triangles)

you need to determine the surface of each and then sum it to one. This will be your final surface.

rectangles:

3*6= 18m²

5*6 = 30m²

4*6 = 24m²

triangles:

You need to determine the square of the triangles from the Heron's formula.

Heron's formula states that the area of a triangle whose sides have lengths a, b, and c is

S=\sqrt{s(s-a)(s-b(s-c)},

where s is the semi-perimeter of the triangle; that is,

s=\frac{a+b+c}{2}.

So the permimeter of the triangle is

2p=4+5+3 = 12m

p = 6m

S = \sqrt{p*(p-a)*(p-b)*(p-c)}  = \sqrt{6*(6-3)*(6-4)*(6-5)}  = \sqrt{6*3*2*1} =\sqrt{36} =6[m^{2} ]

So the surface of the prism is a total sum of all surfaces:

P = 18m²+30m²+ 24m²+2*6m² = 84m²

6 0
2 years ago
A survey team is trying to estimate the height of a mountain above a level plain. From one point on the plain, they observe that
Alex73 [517]

Answer:  3528.25

Step-by-step explanation:Make a sideview sketch

you should have 2 triangles, one right-angled containing the height and a scalene triangle with angles 24° , 153° (the supplement of 27°) and 3°

the side opposite the 3° angle is 1000

by let the side opposite the 24° be x, (also the hypotenuse of the right-angled triangle)

x/sin24 = 1000/sin3

x = 1000sin24/sin3

let the height of the mountain be h

sin 27 = h/x

h = x sin27 = (1000sin24/sin3)(sin27)

= 3528.25

8 0
3 years ago
A runner runs 8 miles in 92 minutes. What is the runner’s unit rate?
SVETLANKA909090 [29]

Answer:

Step-by-step explanation yo candice just died today

7 0
2 years ago
A test question asks you to find two side lengths of a 45° -45° -90° triangle. You know that the length of one leg is 6, but you
Alja [10]

Answer:

The other leg is 6 and the Hypotenuse is 6√2

Step-by-step explanation:

because it's a 45 45 90 the legs equal and the Hypotenuse is square root 2 times leg

4 0
2 years ago
WHAT IS 1+1 WILL GIVE BRAINLIEST
cupoosta [38]

Answer:

2

Step-by-step explanation:

when you add 1 to 1, it equals 2

3 0
3 years ago
Read 2 more answers
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