Answer:
Teletherapy is the external radiotherapy that uses an external source of radiation to kill the tumor cells.
Step-by-step explanation:
Teletherapy is the external radiotherapy that uses an external source of radiation to deliver the radiations such as gamma rays or high energy x rays to kill the tumor cells. Teletherapy is a noninvasive treatment method of cancer and uses the ionizing radiations to target the cancer cells. To minimize the harmful effects on healthy tissues, radiations are given at different angles.