21. A cylindrical pipe touches a wall and the ceiling of a room. The pipe is supported by
a brace. The ends of the brace are 85 cm
from the wall and ceiling. Apply what you
discovered in question 16. What is the
diameter of the pipe? Give the answer to the
nearest centimetre.
85 cm
85 cm​

the 2 figures are congruent bc if you reflect abcd over the y axis then over the d axis the figures overlap

7.9m and 4.3°

step-by-step explanation:

let east be +x and north be +y, x = distance * cos θ, y = distance * sin θ  

for 3.5 south, y = -3.5  

for 8.2, x = 8.2 * cos 30 and y = 8.2 * sin 30  

for 15 west, x = -15  

total x = 8.2 * cos 30 – 15 ≈ -7.9  

total y = -3.5 + 8.2 * sin 30 = 0.6  

magnitude = [(8.2 * cos 30 – 15)^2 + 0.6^2)]^0.5  

the magnitude is approximately 7.9 m  

tan θ = y/x = 0.6/-7.9  

the angle is approximately 4.3˚ north of west

put greater than symbol. (> ). can i get brainliest?