Find the length of CD.

The answer to your question is CD = 4

Step-by-step explanation:

Data

AD = 8

BD = 2

CD = ?

Process

Use proportions to solve this problem. Compare triangle ACD and triangle CDB.

Large triangle     CD/AD

Small triangle      BD/CD

Equal both proportions

                            CD/BD = AD/CD

-Solve for CD

                             CD² = AD x BD

-Substitution

                              CD² = 8 x 2

-Simplification

                              CD² = 16

-Result

                              CD = 4

0.85 or 85%

step-by-step explanation:

1) divide 23 by 27

2) round the decimal to the nearest 10

3) so your answer would be 0.85 or 85%

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk