Question

the area of this triangle is
the perimeter of this triangle is

Explanation:

Step1: Calculate triangle area

Use formula $\text{Area} = \frac{1}{2} \times \text{base} \times \text{height}$
$\text{Area} = \frac{1}{2} \times 12 \times 4 = 24$

Step2: Calculate triangle perimeter

Sum all side lengths
$\text{Perimeter} = 9 + 5 + 12 = 26$

Answer:

Area: 24, Perimeter: 26