Jawab:

160 degrees.

Penjelasan dengan langkah-langkah:

To determine the size of the angle formed by the hour hand and minute hand of a clock at 02.40, we can use the following formula:

angle = |30H - 11/2M|

Where:

H is the hour (in 24-hour format)

M is the minute

At 02.40, H = 2 and M = 40. Substituting these values into the formula, we get:

angle = |30(2) - 11/2(40)|

= |60 - 220|

= |-160|

= 160

Therefore, the size of the angle formed by the hour hand and minute hand of the clock at 02.40 is 160 degrees.