If angle 1 = 145°, and angle 2 = 40°, show that angle 3 = 105°. (picture below)

The measure of an angle is 117°. what is the measure of a supplementary angle?

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)

How are sas and sss used to show that two triangles are congruent?