Segment ef is a mid segment of triangle abc. if bc = 12 cm, what is the measure of segment ef? a. 28 cmb. 21 cmc. 6cmd. 12 cm( explain)

The measure of length of segment EF is 6 cm

C is correct.

Step-by-step explanation:

Segment EF is a mid segment of triangle ABC.

If BC = 12 cm

Please see the attachment for diagram.

EF is mid-segment of ABC

E is mid point of AB and F is mid point of AC.

Using mid point theorem.

EF is parallel to BC

EF is half of BC

Hence, The measure of length of segment EF is 6 cm

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x

c. 1,233 miles