a. Persegi b. Segitiga Diketahui luas sebuah persegi sama dengan luas persegi panjang dengan panjangnya 16 cm dan leb 4 cm . Tentukanlah keliling persegi.

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**Step 1. Compute the area of the rectangle**

The area $$ A_{\text{rectangle}} $$ with length $$ l = 16 \, \text{cm} $$ and width $$ w = 4 \, \text{cm} $$ is given by

$$
A_{\text{rectangle}} = l \times w = 16 \times 4 = 64 \, \text{cm}^2.
$$

**Step 2. Relate the area of the square to the rectangle**

Since the area of the square is equal to the area of the rectangle, we have

$$
s^2 = 64,
$$

where $$ s $$ is the side length of the square.

**Step 3. Solve for the side length of the square**

Taking the square root of both sides,

$$
s = \sqrt{64} = 8 \, \text{cm}.
$$

**Step 4. Compute the perimeter of the square**

The perimeter $$ P $$ of a square is given by

$$
P = 4 \times s = 4 \times 8 = 32 \, \text{cm}.
$$

Thus, the perimeter of the square is $$ 32 \, \text{cm} $$.
The perimeter of the square is 32 cm.

a. Persegi b. Segitiga Diketahui luas sebuah persegi sama dengan luas persegi panjang dengan panjangnya 16 cm dan leb 4 cm . Tentukanlah keliling persegi.

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