Classify the sequence of transformations based on whether or not they prove the congruency of the shapes by mapping shape 1 onto shape 2

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line