Y represents the price of the shirts that said person purchased.
Step-by-step explanation:
-one angle is always 90°
-The side opposite angle 90° is hypotenuse
-hypotenuse is the longest side
-the sum of other 2 interior angles is 90°
-area of right angled triangle is 1/2×base×height
21 goes into 221 about 10 times
21x10=210
Definition: Vertical Angles
Vertical angles are a pair of non-adjacent angles formed when two lines intersect.
