1 The second rectangle has a length of 16 centimeter (6.3 in) and a width of 8 centimeter (3.1 in). 2  Find the linear scale factor between the two shapes. 3  The length of the smaller rectangle corresponds to the length of the larger rectangle. 4  The length of the smaller rectangle equals 4 centimeter (1.6 in).
Reset the Keypad. The Smart or Learn button on the motorized unit attached to the garage ceiling resets the keypad and the control unit that operate the garage door opener's motor. You'll need to enter a new code into the keypad to make it operational again and reprogram the control unit.o verify that the reset took, enter the old PIN code into the keypad to see if it opens the garage door. If it does, the reset didn't take. Repeat the step to reset the keypad and verify the old code doesn't work before proceeding.
1. Install the battery or batteries in the new keypad following the manufacturer's directions. Then program the keypad to the garage door opener. Pick out a four-to six-digit key code depending on the keypad. To enter keypad or remote programming mode, most openers require the pushing of a Learn button on the opener.The button is close to the wiring terminals or under the light cover. Find the model number for the garage door opener. 2  Look up in the instruction manual which frequency and which technology is used for the wireless communication. 3  Buy a wireless keypad that will work with the garage door opener.