Tell whether the triangle with the given side lengths is a right triangle. 3.6 mm, 7.7 mm, 8.4 mm
The triangle is a right triangle.
The triangle is not a right triangle.

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The inside wheels of a car traveling on a circular path are rotating half as fast as the outside wheels. the front two wheels are six feet apart. what is the number of feet in the path traced by the inside front wheel in one trip around the circle? express your answer in the form "k \pi", where k is an integer.

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.