math
posted by joetta .
Find the perimeter and area of a right triangle if one leg measures 9 cm and the other leg measures 40 cm. Students must show all work step by step to receive full credit for the problem. Include correct units with your solution.

"...of a right triangle" is a trigger to the use of Pythagoras theorem to find the third side given the lengths of two legs.
So the length of the third side, S, is:
S=sqrt(9^2+40^2)
which should come out as an integer.
Adding the lengths of all three sides will give the required perimeter.
The are of the triangle is the product of the two legs divided by two.