Question

1.
12 cm
20 cm
16 cm
perimeter:
area:

Explanation:

Step1: Calculate the perimeter

The perimeter of a triangle is the sum of its three sides. So we add the lengths of the three sides: \(12 + 16 + 20\).
\(12 + 16 + 20 = 48\) (cm)

Step2: Calculate the area

For a right - triangle, the area formula is \(A=\frac{1}{2}\times base\times height\). Here, the base can be \(16\) cm and the height can be \(12\) cm. So we use the formula \(\frac{1}{2}\times16\times12\).
First, calculate \(16\times12 = 192\), then \(\frac{1}{2}\times192=96\) (cm²)

Answer:

Perimeter: \(48\) cm
Area: \(96\) cm²