Answer:
Area of ΔABC = 144 ft^2
Step-by-step explanation:
ΔABC is 45 45 90 right triangle
Ratio of leg (AC, BC) : hypo (AB) = x : x√2
Given hypo AB = 24 so AC = BC = 12√2
Area of ABC = 1/2 bh
= 1/2 ( 12√2)( 12√2)
= 1/2(144 * 2)
= 144 ft^2
Cosine of an angle is the adjacent leg divided by the hypotenuse.
So cos(60) = a / 12
I'm going to assume it's your last option because it's not in the picture.
Answer:
n=N-1
Step-by-step explanation:
You can start by imagining this scenario on a small scale, say 5 squares.
Assuming it starts on the first square, the grasshopper can cover the full 5 squares in 2 ways; either it can jump one square at a time, or it can jump all the way to the end and then backtrack. If it jumps one square at a time, it will take 4 hops to cover all 5 squares. If it jumps two squares at a time and then backtracks, it will take 2 jumps to cover the full 5 squares and then 2 to cover the 2 it missed, which is also 4. It will always be one less than the total amount of squares, since it begins on the first square and must touch the rest exactly once. Therefore, the smallest amount n is N-1. Hope this helps!
