Given:
Length of one side of square = 4
Length of one side of triangle = 7
Let's find the area of the triangle.
Let's find the diagonal which is the base of the triangle.
Apply Pythagorean Theorem to find the diagonal.
We have:

Now, to find the area, apply the formula:

Where:
is the area
b is the base = 4√2
h = 7
Thus, we have:

The area of the triangl is 19.8 square units.
Now, to find the primetrer, let's find the hypotenuse using the Pythagorean Theorem:

Now, to find the perimeter of the triangle, we have:

Therefore, the perimeter of triangle 21.7 units.
ANSWER:
• Area = 19.8 square units
,
• Perimeter = 21.7 units