A pair of dice is rolled. What is the probability that the sum is 9 or that the first number is a 2?

#1-20 state whether the angles are alternate interior, alternate exterior, vertical, or corresponding angles.

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle?

Which of these side lengths could form a triangle a) 2 cm , 2 cm , 4 cm b) 3 cm , 5 cm , 10 cm c) 3 cm , 4 cm , 5 cm d) 4 cm , 8 cm , 15 cm