Determine whether the triangle with given sides is right triangle or not

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Worth 30 points! in this diagram, both polygons are regular. what is the value, in degrees, of the sum of the measures of angles abc and abd?

Astore ordered 750 candles a total wholesale cost of $7910.20. the soy candles cosy $12.17 each and thespecialty candles cost $9.58each. how many of each were bought?