Answer:
Area = 60 cm^2
Step-by-step explanation:
Remark
It's a rectangle. So the diagonal divides the rectangle into 2 congruent right angle triangles. You can use Pythagoreas
Givens
c = 13 cm
a = 12
b = ?
Formula
a^2 + b^2 = c^2
Area = L * w
Solution
12^2 + b^2 = 13^2
144 + b^2 = 169 Subtract 144 from both sides
b^2 = 169 - 144
b^2 = 25 Take the square root of both sides.
sqrt(b^2) = sqrt(25)
b = 5
Find the area of the rectangle
Area = L * w
L = 12
w = 5
Area = 12 * 5
Area = 60
