15.) multiply: (5×-2)(5×+2 17.) An angle measures 56° is an example of ______ A.) acute B.) right C.) obtuse D.) none of this 18.) An angle measures 99° is an example of ______ A.) acute B.) right C.) obtuse D.) none of this 19.) An angle measures 90° is an example of ______ A.) acute B.) right C.) obtuse D.) none of this 20.) An angle measures 178° is an example of ______ A.) acute B.) right C.) obtuse D.) none of this
