Question 951401
PROBLEM 1:
{{{a^2+b^2=c^2}}}
{{{a^2=c^2-b^2}}}
{{{a=sqrt(c^2-b^2)}}}
{{{a=sqrt(48^2cm^2-19^2cm^2)}}}
a=44.1 cm ANSWER The length of the missing leg is 44.1 cm.
 
PROBLEM 2:
In a 30-60-90 triangle, hypotenuse is twice shortest side
hypotenuse/2=shortest leg
28 in/2=14 in ANSWER The shortest leg is 14 inches.

PROBLEM 3: 
d=diagonal; A=area={{{(1/2)d^2
{{{A=(1/2)(50^2in^2)}}}
A=1250 sq in ANSWER: The area of the square is 1250 sq in.

PROBLEM 4: 
ANSWER: 20-70-90 is not a "special" right triangle. 
 
PROBLEM 5: 
{{{c^2=a^2+b^2}}}
{{{c^2=15^2+36^2}}}
{{{c^2=1521}}}
{{{c=39}}}
Perimeter=a+b+c
Perimeter=15m+36m+39m
Perimeter=90m ANSWER: The perimeter of the triangle is 90 meters.