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musiclover10045

The three inside angles of a triangle need to equal 180 degrees.

To find X subtract the two known angles from 180.

X = 180 - 45 - 70

X = 65 degrees.

BlueGhirahim

Answer:

65 degrees.

Step-by-step explanation: You can add 45 and 70 to get 115 degrees. Then, you subtract 180 degrees by 115 degrees to get 65 degrees.