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The answer is acute, 45*.

This is an acute triangle because it has all acute sides. (Remember an acute angle is an angle that is less that 90 degrees.) So whenever you want to find the missing angle on a triangle just remember that the sum of all the angles of a triangle = 180 degrees. 70 + 65 = 135; 180 - 135 = 45.

I hope this helps! Good luck on your homework!