Answer:
p ≈ 97 cm
a = 390 cm²
Step-by-step explanation:
First figure out the missing lengths
The triangle on the right is a standard 9 - 12 - 15 right triangle
The triangle in the left is a right isosceles triangle so the sides are both the same 12cm. The hypotenuse is found using c² = a² + b² and is approx 17 cm
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perimeter
p ≈ 12 + 22 + 9 + 15 + 22 + 17
p ≈ 97 cm
Area
a = left triangle + rectangle + right triangle
a = (1/2)(12*12) + (12*22) + (1/2)(9*12)
a = 390 cm²
