Answer:
220 in²
Step-by-step explanation:
1) use a² + b² = c² to find the missing side length by substituting b with 11 and c with 61 ----- a² + (11)² = (61)²
2) this gets a² + 121 = 3721 after squaring 11 and 61
3) subtract both sides by 121 to try isolating the variable which gets a² = 3600
4) find the square root of 3600 to get the value of a, or the missing side which is 60 in
5) since there are three triangles, divide 60 by 3 which has 20 as the length of each small triangle
6) multiply 20 and 11 to get the area of the each small triangle and get 220 in²
