AB = 6 cm, AC = 12 cm Calculate the length of CD.
Give your answer to 3 significant figures.
C
12 cm
55°
А
D
B 6 cm

12.7cm

Step-by-step explanation:

there are 2 triangles , triangle ABC and triangle BCD

use Pythagoras theorem for triangle ABC to find the line BC

let BC = h

12^2=6^2+h^2

making h the subject

h=

h =

so line BC is

for triangle BCD, there's an angle 55 degrees

sin theta = opposite/hypotenuse

where BC is the opposite

theta which is the angle = 55

note h = CD

in 3 s.f ,h= 12.7cm

relating to or denoting a system of numbers and arithmetic based on the number ten, tenth parts, and powers of ten.

step-by-step explanation:

$9.89

step-by-step explanation:

9.90 = p x .06 x .25 (3/12 changed to a decimal)

9.90 = p x 0.015

9.90 - 0.015 = p

9.89 = p