PLEASE HELP 20 points!!!
2 answers:
Answer:
x = 10 cm
Step-by-step explanation:
The volume of a pyramid is , where V = volume, B = area of base, and h = height.
- We're given the height as 14 cm
- We're given the volume as 280 cubic cm
- We're given one of the dimensions of the rectangle as 6 cm
Step 1: Multiply both sides by 3.
Step 2: Divide both sides by 84.
Step 3: Check if solution is correct.
- 10 * 6 * 14 = 840
- 840/3 = 280
Therefore, x = 10 cm.
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We can use the Сosine formula to solve this problem.
<span>First we must find the third side (АС) of the triangle:
</span>
<span>
The smallest angle of the triangle lies opposite the smallest side, so we need to find m</span>∠C.
Now we can use Bradis's Table (I don't know the name in English, maybe Trigonometric Table?) to find m∠C:
m∠С = 38°42' = 38.7°
Answer: 38.7°
<span>I hope this helps</span>
<span>First we must find the third side (АС) of the triangle:
</span>
<span>
The smallest angle of the triangle lies opposite the smallest side, so we need to find m</span>∠C.
Now we can use Bradis's Table (I don't know the name in English, maybe Trigonometric Table?) to find m∠C:
m∠С = 38°42' = 38.7°
Answer: 38.7°
<span>I hope this helps</span>