Answer:
794.42 in² (since I used the pi = 3.14159
, the result is slightly different,
Step-by-step explanation:
Formula: Given radius and slant height calculate the height, volume, lateral surface area and total surface area.
Given r, s find h, V, L, A
h = √(s² - r²)
r = 11 in
h = 4.796 in
s = 12 in
V = 607.7 in³
L = 414.7 in²
B = 380.1 in²
A = 794.8 in
Agenda: r = radius
h = height
s = slant height
V = volume
L = lateral surface area
B = base surface area
A = total surface area
π = pi = 3.14159
√ = square root
The 30º-60º-90º triangle is a special case you'd do well to remember, because the legs always occur in the same ratio to one another. As your picture shows (I'm guessing "SL" stands for short leg?), the sides labeled 4, y and x occur in a ratio of 1 to √3 to 2.
This means
sin(30º) = SL/(2*SL) = 1/2
tan(30º) = SL/(√3*SL) = 1/√3
(and also cos(30º) = (√3*SL)/(2*SL) = √3/2, though you don't really need that here)
So in this triangle, x and y satisfy
sin(30º) = 4/x
tan(30º) = 4/y
This comes straight from the definitions of sine and tangent. Then
4/x = 1/2 ==> x = 8
4/y = 1/√3 ==> y = 4√3
There are 15 mystery books are on the shelf
Answer:
60%
Step-by-step explanation:
If there's 9 people wearing pink out of 15 then your answers 60%
X is 30 because 2x=90 degrees
