A box in the shape of a rectangular prism has a dimension of 30 meters x 27 meters x 28 meters what is the surface area of the b
1 answer:
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Answer:
- C. 144 + 36√3
Step-by-step explanation:
<u>Area formula for equilateral triangle with side a:</u>
- A = √3/4a²
<u>The base area is:</u>
- A = √3/4*12² = 36√3
The three lateral surfaces have same sides of 10, 10 and 12.
<u>Find each surface area using heron's formula:</u>
- s = P/2 = (10 + 10 + 12)/2 = 16
- s - a = 16 - 10 = 6
- s - b = 6
- s - c = 16 - 12 = 4
<u>Total surface area is:</u>
- 48*3 + 36√3 =
- 144 + 36√3
Correct choice is C
Answer:
Step-by-step explanation:
Answer:
90
Step-by-step explanation:
Alright first step what is the degree measure of LN.
A full rotation is 360 degrees so LN=360-270=90.
So angle M is half the difference of the intercepted arcs: