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Lady bird [3.3K]
2 years ago
15

Please answer i need it

Mathematics
2 answers:
EastWind [94]2 years ago
8 0

Answer:

4 and 7

Step-by-step explanation:

4 for 16

7 for 49

g100num [7]2 years ago
5 0
The first one is 4 and the second one is 7
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1. The prism-shaped roof has equilateral triangular bases. Create an equation that models the height of one of the roof's triang
Mandarinka [93]
1. Check picture 1. Let the one side of the triangle be a, drop one perpendicular, CD. Then triangle ADB is a right triangle, with hypothenuse a and one side equal to 1/2a. By the Pythegorean theorem, as shown in the picture, the height is \frac{ \sqrt{3} }{2} a

2. if a a=25 ft, then the height is \frac{ \sqrt{3} }{2} a=\frac{ \sqrt{3} }{2} *25= \frac{1.732}{2}*25= 21. 7 (ft)

3. consider picture 2. Let the length of the roof be l feet.

one side of the prism (the roof) is a rectangle with dimensions a and l, so the area of one side is a*l
the lateral Area of the roof is 3a*l

the area of the equilateral surfaces is 2*( \frac{1}{2} *a* \frac{ \sqrt{3} }{2}a )=\frac{ \sqrt{3} }{2} a^{2}

so the total area of the roof is \frac{ \sqrt{3} }{2} a^{2} +3al

4. The total area was the 2 triangular surfaces + the 3 equal lateral rectangular surfaces. Now instead of 3 lateral triangular surfaces, we have 2.
So the total area found previously will be decreased by al


5. so the area now is \frac{ \sqrt{3} }{2} a^{2} +2al

6. now a=25 and l=2a=50

Area=\frac{ \sqrt{3} }{2} a^{2} +2al=\frac{ \sqrt{3} }{2} * 25^{2}+2*25*50=25 ^{2}  (\frac{ \sqrt{3} }{2} +4)=625*4.866

=3041.3 (ft squared)

7 0
3 years ago
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Can someone help me with these two questions
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8) you go up by 2 on the y-axis and over 3 on the x-axis

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Answer:

i very diffucult question

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3 years ago
Plzz help me im am stuck
Pachacha [2.7K]
I hope this helps you!

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3 years ago
Approximately how many degrees are in the measure of an interior angle of a regular eight sided polygon?
yan [13]
135° I think 1080( what the angles add up to) 1080÷8=135°
4 0
3 years ago
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